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ReadyBoost Q&A

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Back in April, I posted a blog entry on the ReadyBoost feature - the Windows Vista feature that allows you to use a USB key as virtual memory in order to enhance performance. While I originally intended the post to be an overview of ReadyBoost, it proved quite popular and garnered quite a few questions seeking more detail. I apologize that it's taken this long, but I've finally tracked down "the man" who could provide the answers - Matt Ayers, who is the Program Manager in the Microsoft Windows Client Performance group and basically owns the ReadyBoost feature.

Instead of updating the original post, I created this new post entry that will be the home of the Q&A I receive. That way, people won't have to wade through opinions and comments and can come to this post to see only Q&A. 

Note: Matt will be speaking at Tech*Ed where he will present a session on on Vista Perf Improvements (ReadyBoost, ReadyDrive and SuperFetch – CLI312)

From Matt Ayers:

"I'm the Program Manager in the Microsoft Windows Client Performance group and own the ReadyBoost feature. I wanted to give some offical answers based on the excellent questions and discussions that I've seen in this blog, to date. Also, I'll be using this as a starting point for the official ReadyBoost FAQ.

Overall, as many posters have pointed out, the feature is designed to improve small random I/O for people who lack the expansion slots, money, and or technical expertise to add additional RAM. As y’all know, adding RAM is still the best way to relieve memory pressure.

Thanks, again, for your interest, questions and ideas."

 

Q: What perf do you need on your device?
A: 2.5MB/sec throughput for 4K random reads and 1.75MB/sec throughput for 512K random writes

Q: My device says 12MB/sec (or 133x or something else) on the package but windows says that it isn't fast enough to use as a ReadyBoost device... why?
A: Two possible reasons:

  1. The numbers measure sequential performance and we measure random. We've seen devices that have great sequential perf, but horrible random
  2. The performance isn't consistantly fast across the entire device. Some devices have 128M of lightning fast flash and the rest of the device is really slow. This is fine for some applications but not ReadyBoost.

Q: What's the largest amount of flash that I can use for ReadyBoost?
A: You can use up to 4GB of flash for ReadyBoost (which turns out to be 8GB of cache w/ the compression)

Q: Why can't I use more than 4GB of flash?
A: The FAT32 filesystem limits our ReadyBoost.sfcache file to 4GB

Q: What's the smallest ReadyBoost cache that I can use
A: The smallest cache is 256MB (well, 250 after formatting). Post beta2, we may drop it another 10 MB or so.

Q: Ok... 256M-4GB is a pretty big range... any recommendations?
A: Yes. We recommend a 1:1 ratio of flash to system memory at the low end and as high as 2.5:1 flash to system memory. Higher than that and you won't see much benefit.

Q: Isn't this just putting the paging file onto a flash disk?
A: Not really - the file is still backed on disk. This is a cache - if the data is not found in the ReadyBoost cache, we fall back to the HDD.

Q: Aren't Hard Disks faster than flash? My HDD has 80MB/sec throughput.
A: Hard drives are great for large sequential I/O. For those situations, ReadyBoost gets out of the way. We concentrate on improving the performance of small, random I/Os, like paging to and from disk.

Q: What happens when you remove the drive?
A: When a surprise remove event occurs and we can't find the drive, we fall back to disk. Again, all pages on the device are backed by a page on disk. No exceptions. This isn't a separate page file store, but rather a cache to speed up access to frequently used data.

Q: Isn't user data on a removable device a security risk?
A: This was one of our first concerns and to mitigate this risk, we use AES-128 to encrypt everything that we write to the device.

Q: Won't this wear out the drive?
A: Nope. We're aware of the lifecycle issues with flash drives and are smart about how and when we do our writes to the device. Our research shows that we will get at least 10+ years out of flash devices that we support.

Q: Can use use multiple devices for EMDs?
A: Nope. We've limited Vista to one ReadyBoost per machine

Q: Why just one device?
A: Time and quality. Since this is the first revision of the feature, we decided to focus on making the single device exceptional, without the difficulties of managing multiple caches. We like the idea, though, and it's under consideration for future versions.

Q: Do you support SD/CF/memory stick/MMC/etc.?
A: Mostly. In beta2, we added support for a small number of SD/CF cards on internal USB2 & PCIe busses. RC1 has a much broader support range.

Q: Why don't you support SD on my USB2.0 external card reader?
A: We unfortunately don't support external card readers - there were some technical hurdles that we didn't have time to address. In general, if a card reader shows a drive without media in it (like a floppy drive or CD ROM does), we can't use it for ReadyBoost.

Q: Will it support all USB drives, regardless of how they are ID'd to the OS ("hard disk drive" or "Device with Removable Storage")?
A: We have no way to tell what is on the other end of a USB cable so we do some basic size checks (since no one has a 200GB flash device ;-) ) and then perform our speed tests. HDD will not, however, pass our speed tests, and there is no benefit to using a USB HDD for ReadyBoost.

Q: Can you use an mp3 player to speed up your system?
A: Not currently. MP3 players use the 'plays for sure' interfaces to expose themselves to Windows. We require that the device appear as a disk volume. These aren't currently compatible.

Q: How much of a speed increase are we talking about?
A: Well, that depends. On average, a RANDOM 4K read from flash is about 10x faster than from HDD. Now, how does that translate to end-user perf? Under memory pressure and heavy disk activity, the system is much more responsive; on a 4GB machine with few applications running, the ReadyBoost effect is much less noticable.

Q: I can't get my device to work with ReadyBoost... can I lower the perf requirements?
A: Unfortunately, no. We've set the perf requirements to the lowest possible throughput that still makes your system faster. If we lowered the perf requirements, then there wouldn't be a noticeable benefit to using ReadyBoost. Remember, we're not adding memory, we're improving disk access.

Q: Which manufacturers support ReadyBoost?
A: Well, I hope that all of them do, eventually. Right now, we're working with manufacturers to create a program that will allow them to identify ReadyBoost capable devices on their packaging.

Comments

  • Anonymous
    June 03, 2006
    The comment has been removed

  • Anonymous
    June 03, 2006
    Hi,

    What about pc's with a memory size of 4GB for example? Can I decide to use a part of my motherboard memory as virtual memory istead of a USB storage device?
    Can some one tell me more about this issue.

    Thank you,

    Oguz_mazlum@hotmail.com

  • Anonymous
    June 03, 2006
    The comment has been removed

  • Anonymous
    June 04, 2006
    The comment has been removed

  • Anonymous
    June 04, 2006
    The comment has been removed

  • Anonymous
    June 05, 2006
    Nice post, Tom.
    I had a few questions on ReadyBoost, and now they have answers!

    So, on my 2 GB machine I wouldn't notice any difference. I'll try, this is sure. The problem is that I haven't a 2 GB USB memory...

  • Anonymous
    June 05, 2006
    Nice post, Tom.
    I had a few questions on ReadyBoost, and now they have answers!

    So, on my 2 GB machine I wouldn't notice any difference. I'll try, this is sure. The problem is that I haven't a 2 GB USB memory...

  • Anonymous
    June 06, 2006
    Fantastic FAQ.

  • Anonymous
    June 07, 2006
    Where could I obtain the nice stop watch tool that MS was using at WinHEC to display the ReadyBoost benefits?

  • Anonymous
    June 07, 2006
    Hey Tom,
    How can I get a hold of that utility that measures the time it takes to launch applications with and without ReadyBoost?  I saw it several times at WinHEC.

    Please let me know.  Thanks!
    Luis F.

  • Anonymous
    June 11, 2006
    The comment has been removed

  • Anonymous
    June 11, 2006
    make it work like ram, that would be a cool feature

  • Anonymous
    June 12, 2006
    The comment has been removed

  • Anonymous
    June 12, 2006
    I have used a empty 512mb memory stick which i formatted and it says there is not enough space on it what is happening??

  • Anonymous
    June 12, 2006
    Is there something specific that needs to be "set" for this to work? Is there any "secret" app that we can run to check for compatibility? If not, then I have another non -worker.

    The Memorex Traveldrive 2GB....

  • Anonymous
    June 13, 2006
    If I am running Windows VISTA on a Microsoft Virtual PC how do I get it to detect the USB drive.

  • Anonymous
    June 15, 2006
    Well.. I know we all breathe Sharepoint, but hey you need an OS to runon.... Who can beat VISTA? Who...

  • Anonymous
    June 15, 2006
    PingBack from http://alpesh.nakars.com/blog/?p=33

  • Anonymous
    June 15, 2006
    The comment has been removed

  • Anonymous
    June 16, 2006
    The comment has been removed

  • Anonymous
    June 16, 2006
    re: Windows Ready Boost - Windows Vista

  • Anonymous
    June 16, 2006
    The comment has been removed

  • Anonymous
    June 16, 2006
    Will it make any difference to ReadyBoost performance if you have the USB flashdrive set up to "Optimize for 1) Quick removal or 2) Best Performance/

    Thanks,
    Zack
    p.s. Please get more info out about PowerBoost, this is the most info I could find on the net, and there is no PowerBoost entry in the Help file(I had disabled teh service which controls PowerBoost so was having tons of trouble.)
    It would be nice if the service had a description mentioning PowerBoost.

  • Anonymous
    June 17, 2006
    I was wondering...
    Would it be faster to use this ready boost on a CF card connected to and IDE interface?

  • Anonymous
    June 22, 2006
    The comment has been removed

  • Anonymous
    June 23, 2006
    PingBack from http://newyear2006.wordpress.com/2006/06/24/readyboost-zur-performancesteigerung-unter-vista/

  • Anonymous
    June 27, 2006
    The comment has been removed

  • Anonymous
    July 01, 2006
    The comment has been removed

  • Anonymous
    July 05, 2006
    Windows Vista is no small operating system.  The additional graphics functionality, search databases...

  • Anonymous
    July 08, 2006
    Tom, the ReadyBoost feature is nice, but it appears there's a lot of DDR2 memory in my machine that is not being used by Vista.  How can I achieve greater utilizatization of my existing RAM?

  • Anonymous
    July 11, 2006
    Is there any way to program a device to automatically "ReadyBoost" when the drive is inserted into the machine?

  • Anonymous
    July 12, 2006
    The comment has been removed

  • Anonymous
    July 16, 2006
    Perhaps the entry on card readers needs revising?

    I'm on Vista beta 2. USB 2.0 is via a NEC PCI card.

    I have a no-name multi card reader into which I've inserted a 512M Memory Stick PRO Duo. Vista accepted this and has put a 410MB file onto it.

    I can't tell if it is actually using that 410MB file, but it didn't complain at any point.

    BTW it's a bit annoying that I can't use a 256M CF card because however I format it, it's always got slightly less than the required 256M available, so yes, it might be sensible to reduce the requirement by e.g. 20M.

  • Anonymous
    July 19, 2006
    The comment has been removed

  • Anonymous
    July 26, 2006
    Hi,
    I would like to know how Vista decides whether the Device is capable for ReadyBoost. Your QA gives a partial answer that "we do some basic size checks and then perform our speed tests" , but is it only the size and speed of the disk device that decides this or any other registry/device setting is present?

    thanks
    arun

  • Anonymous
    August 02, 2006
    I have formatted my 512mb USB stick with a NTFS partition and it seems that ReadyBoost will not recognise my USB stick. SO my question is " DOES READYBOOST WORK WITH A NTFS FORMATED USB STICK ? .........CHEERS.

  • Anonymous
    August 03, 2006
    Is there a list of compatible SD cards for ReadyBoost published somewhere yet? I have a new smartphone that can take an SD card, so if I'm going to buy an SD card, I would like to get one that will be compatible with Vista for ReadyBoost. Any recomendations?

  • Anonymous
    August 04, 2006
    So yesterday I was playing around with Vista.  I wanted to try the new ReadyBoost Feature that allows...

  • Anonymous
    August 04, 2006
    Can ReadyBoost be used with GigaByte i-ram drives?

  • Anonymous
    August 05, 2006
    Tom Archer interviews Matt Ayers, PM for the ReadyBoost technology in Vista (think - USB to speed up...

  • Anonymous
    August 08, 2006
    I just got a Transcend 4GB 150x SD card to use with ReadyBoost. With its default FAT32 file system, it didn't work with ReadyBoost, but after I formatted to NTFS (with default file allocation size) it then worked with ReadyBoost. It may just be the default allocation size that made it work though, for all I know the SD card may have come formatted with some standard allocation size for FAT32. Still, changing the allocation size or the file system may work for others.

  • Anonymous
    August 16, 2006

    On my regular travels around the web, I stumbled upon a brilliant resource for information...

  • Anonymous
    August 27, 2006
    I got a question to ask. If I happen to have one SSD drive (pass the performance requirement to have ReadyBoost feature turned on) which I install it as Drive D (the SSD came with IDE connector). And, I apply one regular hard disk with Vista installed. Now, is there any way I could obtain the ReadyDrive feature turned on with this combination ?

    Thanks,

  • Anonymous
    August 27, 2006
    ReadyBoost は使いたいけど、USBメモリによる情報漏えいは避けたい

  • Anonymous
    August 27, 2006
    ReadyBoost は使いたいけど、USBメモリによる情報漏えいは避けたい

  • Anonymous
    August 29, 2006
    The comment has been removed

  • Anonymous
    September 02, 2006
    Just bought a new USB stick with a capacity of 4 GB (3.78 GiB); ideal to transfer ISO files and even...

  • Anonymous
    September 02, 2006
    The comment has been removed

  • Anonymous
    September 05, 2006
    The comment has been removed

  • Anonymous
    September 06, 2006
    With the double WRITE (Disk + USB) and the encryption of the data (USB), I wonder what is the EFFECTIVE gain if we compensate for time loss with encryption and doubling the "writes" ...  Let me know!!!

  • Anonymous
    September 07, 2006
    Ashok mate, you'd be FAR better off just buying enough RAM.  Even if this works (and I'm very skeptical) you'll get 10%. Absolute tops. Improvement.

    Doubling your RAM would be a massively higher benefit.  Quadroupling it probably even better.

  • Anonymous
    September 08, 2006
    The comment has been removed

  • Anonymous
    September 09, 2006
    The comment has been removed

  • Anonymous
    September 09, 2006
    I have A-Data MyFlash 256MB from Newegg and it works even though the drive has been used extensively since i bought it in January and i only started using it for Vista in RC 1

  • Anonymous
    September 10, 2006
    The comment has been removed

  • Anonymous
    September 11, 2006
    Where can I find Event Log for ReadyDrive, mentioned briefly above? Thanks

  • Anonymous
    September 11, 2006
    Under ReadyBoost... :)

    Expand the tree and there ye shall be!

  • Anonymous
    September 11, 2006
    Rumor has it that the Apacer Handy Steno (HT203) makes a very good ReadyBoost choice.

    512MB
    http://www.newegg.com/Product/Product.asp?Item=N82E16820180014

    1GB
    http://www.newegg.com/Product/Product.asp?Item=N82E16820180015

    2GB
    http://www.newegg.com/Product/Product.asp?Item=N82E16820180016

    4GB
    http://www.newegg.com/Product/Product.asp?Item=N82E16820180017

  • Anonymous
    September 11, 2006
    In some cases even a slower USB device could help. For example an older notebook with 1G ram and a slow HDD (4200RPM). It these cases you can enable readyboost with a slow device.

    1. Let Vista test is, and check the Do not Retest this device checkbox.
    2. Unplug the device
    3. Go to regedit
    HKLMSOFTWAREMicrosoftWindows NTCurrentVersionEMDMgmt
    4.find the key related to you device (the device  vendor and name is in the key)
    5. Change the follwing values:
     Device Status 0x02
    ReadSpeedKBs 0x1000
    WriteSpeedKBs 0x1000
    6. Plug the device, right click on it to open properties and enable cache.

  • Anonymous
    September 14, 2006
    My Memorex Travel 1GB doesn't work either. Maybe I'll throwdown on a A-Data MyFlash...

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 14, 2006
    yes, but this is not the case
    http://www.pcstats.com/articleview.cfm?articleid=1706&page=2

    there you can se an benchmarktest with sandra 2005

    Buffered Read : 17 MB/s
    Sequential Read : 17 MB/s
    Random Read : 14 MB/s
    Buffered Write : 2641 kB/s
    Sequential Write : 11 MB/s
    Random Write : 7 MB/s
    Average Access Time : 15 ms

    isnt that qualified ?

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 14, 2006
    The comment has been removed

  • Anonymous
    September 16, 2006
    I agree.  It doesn't matter what any benchmarking utility says.  Sisoftware Sandra would freeze when benchmarking my A-data Myflash 256 drive but it works with readyboost.  HDtach puts the access time at .8ms.

  • Anonymous
    September 16, 2006
    Is there any equivalent application to Ready Boost that one can download for Windows XP?

  • Anonymous
    September 17, 2006
    The comment has been removed

  • Anonymous
    September 17, 2006
    The comment has been removed

  • Anonymous
    September 19, 2006
    The comment has been removed

  • Anonymous
    September 20, 2006
    PingBack from http://gomeler.com/2006/09/20/extremetech-reviews-the-readyboost-feature-of-vista/

  • Anonymous
    September 20, 2006
    PingBack from http://www.hanselman.com/blog/VistaAndReadyBoost.aspx

  • Anonymous
    September 22, 2006
    This week I went out to Harris Technology and got myself a 2GB USB Key. It was a good price so I couldn't...

  • Anonymous
    September 22, 2006
    Just wondering if you can software RAID usb in vista, would be great raiding 4 usb pens and using them for readyboost

  • Anonymous
    September 22, 2006
    you wouldn't gain anything.  ReadyBoost is essentially doing random 4KB reads.  RAID0, which I guess you were referring to, wouldn't speed that up at all.  It would be using much larger units to stripe with.  The only way it could be made faster is if ReadyBoost were able to use more than one stick, itself.  The MS guys have said they have thought of that scenario, too, but it was too complex to implement for the first release of Vista.  So perhaps in a future release we'll see multiple sticks being available for ReadyBoost.

  • Anonymous
    September 22, 2006
    Ok, thanks for the reply, I was also wondering if there are any plans or have already been developed for say, something like a USB adapter which can take, say, a So-DIMM and has battery backup to make it non volotile, these would be great for USB storage and would get a max speed of 33mb/s for writing at reading.

  • Anonymous
    September 23, 2006
    well, you can get devices that look like an IDE hard drive  to the OS that actually take ram, which is similar to your idea.  But they're going to be faster, since they'll be using IDE instead.  They're not exactly cheap, though.  Usually called a solid-state drive.  Used to be really expensive, but now you can get one for something resembling a reasonable price.  Probably more than worth it if you have the need for one.

  • Anonymous
    September 23, 2006
    Good morning Cincinnati! 
    (and I do apologize for forgetting to change my good morning slide,...

  • Anonymous
    September 23, 2006
    The comment has been removed

  • Anonymous
    September 23, 2006
    The comment has been removed

  • Anonymous
    September 25, 2006
    PingBack from http://www.techenclave.com/forums/vista-rc-1-ready-boost-using-79122.html#post480351

  • Anonymous
    September 25, 2006
    Depending on who talk to, people will tell you how happy/unhappy they are with current Windows Vista...

  • Anonymous
    September 25, 2006
    The comment has been removed

  • Anonymous
    September 25, 2006
    The comment has been removed

  • Anonymous
    September 27, 2006
    The comment has been removed

  • Anonymous
    September 27, 2006
    The comment has been removed

  • Anonymous
    September 27, 2006
    I don't think windows treats executable code pages or data pages any differently.  It just concerns itself with whether or not pages are getting accessed, regardless of type, and makes its decisions based on that access.  As for surprise removal of the device, all pages on the ReadyBoost device are also on disk.  The ReadyBoost device is just a cache of what's on disk.  So it won't matter if/when you yank the device, nothing bad's gonna happen.

  • Anonymous
    September 27, 2006
    PingBack from http://ginex.wordpress.com/2006/09/28/vista-ready-boost/

  • Anonymous
    October 01, 2006
    i would love to know if there are some performance counters that i could use to see the cache hits or performance increase from readyboost.  it would also be fun to stick something on the sidebar and show people the benefits in real time.

    -joey

  • Anonymous
    October 01, 2006
    The comment has been removed

  • Anonymous
    October 04, 2006
    readyboost makes it faster -- maybe

  • Anonymous
    October 04, 2006
    The comment has been removed

  • Anonymous
    October 13, 2006
    The comment has been removed

  • Anonymous
    October 16, 2006
    I have heard that there is a way to manually force the use of readyboost on a drive through a registry change.  Anyone have any ideas on how to do this?  Would this work in the case of the lack of support for 32-bit cardbus?

  • Anonymous
    October 19, 2006
    Reply on CH above me ;) Just go to the reply of Sefi in this topic. I usually read the replies before asking without searching ;) Tuesday, September 12, 2006 4:42 AM by Sefi

  • Anonymous
    October 19, 2006
    PingBack from http://techhead.wordpress.com/2006/10/14/vista-weekend-windows-vista-rc2-highlights/

  • Anonymous
    October 20, 2006
    The comment has been removed

  • Anonymous
    October 26, 2006
    Sous Windows Vista, une des options intéressantes (signalée dans la page de présentation de Microsoft)

  • Anonymous
    November 01, 2006
    http://avo9.com - gift basket shop <a href="http://avo9.com">gift basket</a>  

  • Anonymous
    November 03, 2006
    An iPod Nano will work, at least it did for me.   I think I had to format it as FAT or the other FAT, not NTFS, to get it to work, but it should.

  • Anonymous
    November 04, 2006
    PingBack from http://trenddiary.com/plasmadiary/2006/11/03/windows-vista-and-a-umpc-readyboost-101/

  • Anonymous
    November 07, 2006
    The comment has been removed

  • Anonymous
    November 08, 2006
    PingBack from http://www.leeevans.org/windows_vista/windows_vista_readyboost/

  • Anonymous
    November 08, 2006
    Try to use in RC2 build 5744 any readyboost device pluged in and video on Itunes. For some reason it does not work. If you remove the device it works very well. I gess Itunes is the Culpit but never the less is something to watch for.

  • Anonymous
    November 08, 2006
    PingBack from http://www.antoniocheca.com/blog/2006/11/08/windows-vista-has-gone-gold/

  • Anonymous
    November 15, 2006
    Using ReadyBoost on a 4GB iPod Nano. At first the device was too slow for ReadyBoost, but after a defrag it works great. I have 1GB of RAM and I used to notice that icons and thumbnails would take a few milliseconds to show up, but now they are just there. Great work! I'm wondering though...can I restart without removing the device? Is that safe? I ask because I'm curious to know if the sf file remains on the iPod during a restart.  I know Vista destroys the file if I safely remove the device. Actually I've never restarted without safely removing the device, because I'd rather not risk losing 3GB of music. If the sf file is destroyed after restarting, maybe it'd be a good idea to have it persist...or at least let the user elect to have it so? Nice work anyway!

  • Anonymous
    November 19, 2006
    The comment has been removed

  • Anonymous
    November 19, 2006
    Alternatively, you could buy a 32GB Solid State Disk just to install Windows and its swap file.  That should be enough as long as you install all your programs and data files to a separate hard disk.  This way you get super-fast OS performance.  Even a 15MB/s SSD will boot Windows Vista 21% faster on a laptop.  The new 32GB SSDs operate at 24 - 32MB/s so performace will be even better.  <1ms access times seem to give a better performance than higher sustained throughput, as evidenced by our Microsoft Man's saying its the 4K random reads that are cached and improve performance.

  • Anonymous
    November 20, 2006
    If there is one thing that can really help applications on Windows Vista run better, it's memory. When

  • Anonymous
    November 20, 2006
    If there is one thing that can really help applications on Windows Vista run better, it's memory. When comparing the performance of Windows XP and Windows Vista on a PC with 1 GB of main memory, Windows Vista is generally comparable to Windows XP or faster.

  • Anonymous
    November 21, 2006
    The comment has been removed

  • Anonymous
    November 21, 2006
    Yay this device seems cool,  a 2 gig solid state disk that you just plug into the usb pin connector on your motherboard. Guaranteed seektime <1ms But still $179 that's steep for me (medical student)

  • Anonymous
    November 21, 2006
    http://www.pqi.com.tw/product2.asp?oid=140&cate1=148&PROID=115 See post above

  • Anonymous
    November 21, 2006
    PingBack from http://www.tipsdr.com/?p=609

  • Anonymous
    November 22, 2006
    PingBack from http://www.plzalliance.com/?p=119

  • Anonymous
    November 24, 2006
    I noticed a few of you could get one drive to work but not another.  i was having a similar problem.  i had a 512 memorex and upgraded to a 4gb sandisk.  when i first plugged in the sandisk(memorex not plugged in) it said it was incapable.  then i plugged in hte memorex and disabled it and it would then allow me to use the 4gb sandisk.  i do a lot of photo editing with large files and personally i love this idea.  VERY NOTICABLE DIFFERENCE!

  • Anonymous
    November 24, 2006
    How can we monitor how well ReadyBoost is working? Something like taskman?

  • Anonymous
    November 25, 2006
    PingBack from http://blog.bluespark.co.nz/?p=37

  • Anonymous
    November 26, 2006
    nice site u have . visit my news blogs at http://readier.org & http://1what.com

  • Anonymous
    November 27, 2006
    Well i was very enthousiast about this but my answer was this when i tried to use my Packard bell USB key "the device is plugged into an unsupported interface" i connected it directly to my USB port on my motherboard, tried through usb hub ...what can it be? well at least it was worth the try.. thanks for the faq

  • Anonymous
    November 28, 2006
     Has anyone tried on of the A-data MMC 200x cards with readyboost?  I have a dell laptop with one of the SD/MMC card slots and was able to find one of these for less than $40 bucks. The 200x would seem to mean that its as fast as the apacer usb devices that have been tested.

  • Anonymous
    November 29, 2006
    Windows Vista に搭載された ReadyBoost について 技術的な視点からの Q&amp;A (Beta 2時点) が掲載されていました Tom Archer&#39;s Blog http://blogs.msdn.com/tomarcher/archive/2006/06/02/615199.aspx

  • Anonymous
    November 30, 2006
    I purchased a USB stick at the weekend to speed up my ailing Sony A190. Unfortunately the ReadyBoost

  • Anonymous
    December 01, 2006
    The comment has been removed

  • Anonymous
    December 02, 2006
    PingBack from http://www.gottabemobile.com/ReadyBoostWithASDCardYesOrNo.aspx

  • Anonymous
    December 08, 2006
    The comment has been removed

  • Anonymous
    December 11, 2006
    The comment has been removed

  • Anonymous
    December 12, 2006
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    Guys as a company wishing to take advantage of readyboost when we eventually roll it out we purchased a number of 2GB USB drives that we know to be compatible with ReadyBoost and the results so far seem to indicate that  you should not use FAT32, either with the "Performance" policy against the device or the "Optimise for quick removal" - write performance in all cases so far is far worse than FAT. This probably won't be a huge difference to ReadyBoost since it's testing (I presume) read performance. But given that read performance doesn't change much with either FAT or FAT32 I'd recommend for the time being sticking with FAT. I'll be happy to upload the final results - it's hardly exhaustive but I've tried out about 5 key rings so far.

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    Well, now I'm really peeved. I went out and bought a SanDisk Extreme III 2 gigabyte SD card with, apparently, the best read-write performance possible and when I plug it in my laptop (Phillips Freevents ) the thing refuses to allow me to use the ReadyBoost feature. Can we get hold of some sort of "Ready for readyboost" application to test the criteria?

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    December 21, 2006
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    December 28, 2006
    is there a version of readyboost for XP ?

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    December 28, 2006
    Hello. I used both a 512Kb Kingston SD card and a 4.0 Gb Sandisk Cruzer micro and ReadyBoost works with both (one at a time). However I realized a very annoying problem with readyboost in two laptops (a Thinkpad T43 and a no-brand AMD athlon 3000+): Vista seems to freeze for some miliseconds each second. I tried to copy large files to the sandisk and to the SD card and when writing or reading from the USB pen or from SD card there is no freeze at all. The problem only happens when the media has readyboost enabled or the readyboost service is Started. Does somebody is experiencing this issue?

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    December 28, 2006
    Another interesting thing: I enabled ReadyBoost at 512 MB. My system disk had 30gb free space, but after becomed 37GB. So, how readyboost works exectaly???

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    When I enable Readyboost on my Thinkpad T43 using a 4.0 Gb Sandisk Cruzer the OS becomes less responsive, freezing for an instant each 1 second. Anybody experiencing this?

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    January 03, 2007
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    January 04, 2007
    I just bought a GXT USB Drive 2G and to my surprise it doesnt work with ReadyBoost! It writes 5MB per second and reads 8mb per second. What's the problem here? Also my computer detects it as a hard drive!

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    January 11, 2007
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    January 11, 2007
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    January 25, 2007
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    February 03, 2007
    Tom, I have a Sony laptop with 1GB RAM, 60GB HDD, and 1.73 Centrino.  Vista Experience numbers are all OK except the shared 128MB graphics board give me only 1.0.   I put in a 2GB SanDisk Cruzer Micro (ReadBoost Enhanced) and all my Vista Experience numbers are identical.  Should something improve here? Larry

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    February 03, 2007
    Will a 4GB Sony Memory Stick Pro work OK?  At least I could add this and it wouldn't protrude from the laptop.  Thanks. Larry

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    February 17, 2007
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    February 18, 2007
    Can a 4gb SD card be partitioned into a 2gig readyboost section and second 2 gig area for files? Pls email in addition to posting if possible. Thanks

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    February 27, 2007
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    Hey, first of all ...........this is a gr8 informative site!!! I tried using my Transcend 1GB USB Drive for Ready Boost but it says 'This device does not have required performance characteristics for use in speeding up your system' . I tried formatting it with NTFS, FAT32, tried increading the allocation size, but no help. Is there any possible solution to this apart from getting a new drive. Also how am i supposed to identify if a particular drive will work for ready boost while buying it?

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    March 03, 2007
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    March 05, 2007
    I've been testing a couple of my USB sticks and I can't figure out what's going on. First was the PNY Attache 1GB, which gave a read speed of around 5000kb/s, but the write speed was only around 1000Kb/s, causing it to fail the test. Next, I tried a Sandisk Cruzer Titanium, and it had a read speed of only 3300Kb/s, yet it's read speed was around 6500Kb/s.  This drive passed. Then, I transfered a single 700MB file to and from both drives, timing their respective performance.  The Sandisk Cruzer Titanium was about a minute faster on the write, which was expected, considering what Vista had tested their write speeds to be.  What blew my mind was that the Cruzer Titanium also transfered the file back to the hard drive faster, suggesting it's read speed was also faster.  which didn't coincide with Vista's speed tests.   I'd like to know how Vista measurements differ from my experience, and what would make a slower, cheaper drive post a faster read time than one costing three times as much. What I'd like to know is, what is it about the memory in the cheaper PNY stick for it to have suc

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    March 05, 2007
    I made a typo in my above post.  I mean't that the Sandisk Cruzer Titanium had a WRITE speed of 6500Kb/s.

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    March 05, 2007
    I realize I didn't even finish my last sentence. :) I mean't to say, What I'd like to know is, what is it about the memory in the cheaper PNY stick for it to have such a (supposedly) faster read, whereas a drive costing three times as much clocks in at 3/5 the speed?

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    March 05, 2007
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    March 05, 2007
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  • Anonymous
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    Ready boost disappears after rebooting. I was using 2GB PQI 150x SD card in my Dell latitude D420 laptop SD card slot. I was wondering why sometimes the cache file is there, and sometimes it is gone that I had to rebuild the file. I was having the problem again, so I just rebooted several times hoping it would come back, but it didn't. This time the whole drive disappeared. I found out that my 2GB SD card somehow died on me. I've been using my laptop heavily with the SD card inserted for about 3 weeks now. Now I can't read or even format the SD card now. Tested on several computers/card readers, but looks completely dead. I'm wondering if the ready boost caused the problem on my 2GB SD card. Does the 150x speed written on the SD card has anything to do? I know it is suppose to be faster, but I'm thinking, does it use higher frequency which might not be safe for ready boost purpose? I also have a 1GB lexar SD with no speed written on it, and that one also works as ready boost, while one of my kingston 1GB SD with no speed marking doesn't qualify for ready boost.

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    April 03, 2007
    hello, Question Would this one work for readyboost? http://www.geeks.com/details.asp?invtid=MICRSTOR-22GB it took me 2 hours, but i found the same information. all what i know that "Ritek" company makes it, but i couldn't find any more information. It says that it goes up to 40Mbp, i am guessing "MB per sec" but what about Random? Please PLEASE Help !!

  • Anonymous
    April 04, 2007
    Fun Fun with Vista.... I have had my 4gb Kingston DataTraveller 2 Plus w/MiGo installed in my Vista system for a while now.. The USB stick had some files on it and Vista took the rest of the space for the Readyboost file.. Well yesterday i wanted to put a file on the usb stick and when i went to look at the drive it said it needed to be formatted. tried the usb stick on other computers and still came up with the same error... So my data is gone (i hope i dont need anything on that stick...) Doing  a bit more googling then i might have to format...

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    April 08, 2007
    I am a forensic analyst. What information forensically speaking, might be left on a Ready Boost enabled drive thats left in a target computer?

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    April 10, 2007
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  • Anonymous
    April 11, 2007
    Hi, I have a question pls help. I have HP Pavilion dv6000 laptop with 512 mb of memory. Now to speed up my laptop i have purchased 2 gb ready boost of Kingston but my computer is not showing increase memory and nor showing any performance. I have microsoft vista. What is the problem ?

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  • Anonymous
    April 18, 2007
    After I have enabled to use Readyboost, say 1790mb, for some reason it doesn't actually enable it. Like I have seen others using it, there would be a Readyboost file in the drive with a size of that 1790mb. However, in my case, after I enabled it and check the drive, its like nothing happened. Then I checked the USB's properties, and the Readyboost setting is back to do not use it. Can someone please help? Thanks

  • Anonymous
    April 20, 2007
    I am using a Toshiba Satellite 2400 laptop. The RAM on this machine can only be expanded to 512mb, which I have done. So will the addition of a "Boost Ready" USB drive make any difference to the performance of Vista. Vista currently works, but it is extremly slow. Cheers Peter

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  • Anonymous
    April 26, 2007
    ReadyBoost will work with Sony Micro Vault Tiny 2gb on my Dv9000 with vista 32bit and 2gb system memory.

  • Anonymous
    April 26, 2007
    It  seems to me that if you "permanently" put in a memory card or USB memory stick and told Windows XP to put the page file on that drive, it would simulate ReadyBoost. You'd lose the stability and the reasonably guaranteed performance gains, but it would help most people most of the time, less when they yanked the drive. ;)

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    April 27, 2007

  1. If you’ve got your 2 gigs of RAM and a decent video card, definitely enable the AERO Theme. It actually

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    April 27, 2007
    Nope - can't use a mapped network drive for readyboost...........MAKE IT HAPPEN lol

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    May 01, 2007
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    May 09, 2007
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  • Anonymous
    May 11, 2007
    Found a way to make a SD card work when Vista 64 bit initially said it was not capable ... some earlier posters who had problems with their cards or USB sticks might wanna try this I'm using 1 GB Sandisk SD card in internal card reader Reformat card from FAT32 to NTFS retest card using Readyboot... hey presto it works after doing this you can put data back on card and still use Readyboost- but you need to leave Readyboost plenty of space to work eg at least 0.5GB If your USB key or SD card or whatever is heavily fragmented or is FAT32 it most likely wont work

  • Anonymous
    May 12, 2007
    Readyboost doesn't appear to increase performance at all for me at this point. Trying a SanDisk 4GB usb drive, Vista finds it right away and allows use of the full 4 gigs, but performance doesn't improve. I've tried it on 3 systems in my home: Laptop with Vista Ultimate x64 2 GB ram 120 GB hard drive 7200 rpm AMD Turion 64 x2 1.8 ghz cpu Desktop with Vista Ultimate x86 3 GB ram 150 GB SATA hard drive 7200 rpm x 2 P4 3.4ghz x86 cpu Desktop with Vista Ultimate x64 3 GB ram 150 GB SATA hard drive 7200 rpm x 2 P4 3.0ghz x64 cpu No noticable performance gains.  Waste of money for the usb drive I bought.

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  • Anonymous
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    Hey folks, I recently bought a LaCie 320 GB external hdd. When I formatted it to NTFS file system it asked me if I would like it to use it for ReadyBoost. I did, because I have only 1 GB of RAM, but it said several times I couldn't use it because it didn't meet the requirements. Then suddently it worked, but my computer doesn't indicate more RAM. The package sais up to 480 Mbit/s transfer speed, but I think this isn't realistic.

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  • Anonymous
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    Heres how to get Readyboost to work on unsupported devices and external hard drives.

  1. Plug in the device.
  2. Open the Readyboost tab on the device properties.
  3. Select "Do not retest this device"
  4. Unplug the device
  5. Open regedit (start->run->regedit)
  6. Expand - HKLM (Local Machine)SOFTWAREMicrosoftWindows NTCurrentVersionEMDgmt
  7. Find your device.
  8. Change Device Status to 2
  9. Change ReadSpeedKBs to 1000
  10. Change WriteSpeedKBs to 1000
  11. Plug in the device.
  12. Enable Readyboost!!!! Jay jay.jayan@gmail.com