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Speed writing to the SSD continually fluctuates ...

Anonymous
2021-01-07T23:09:11+00:00

I am using Windows 10 with an 512GB Solid State Drive SATA III. The SSD is ~ 85% empty. I have a camera streaming images, via USB3, which are buffered in RAM and then saved to the SSD in an AVI file. My problem is that, while monitoring the usage of the SSD in the Task Manager, that the write speed to the SSD can fluctuate between 200 MB/sec and 10 MB/sec even though the % usage is ~ 100%. When the write speed is low the RAM fills up with images and the total number of images that I can acquire in a given time is greatly reduced. Unfortunately, the write speed spends much more time at ~ 10 MB/sec than it does at 200 MB/sec. The problem does not appear to be a limitation of the write speed of the SSD but how the OS is allocating the SSD. Is there a way improve the overall SSD write speed for my application? Thanks. TJS

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2021-01-09T19:29:47+00:00

    Hi,

    I agree with Igor in that the problem is probably with the SSD.. That is why things are being buffered in RAM..

    What you describe is a common problem with a lot of the "TLC" type SSDs.. They typically use a buffer of maybe 8GB, or maybe less, of really fast memory as a buffer.. The actual write speed to the actual storage area can be much slower.. Especially if overwriting an area on the drive which requires first resetting the area being overwritten to zeros before new data can be written..

    I have personally had similar issues as you describe with two of the TLC type SSDs, although mine were 128GB which aggravates the matter even more as they only have 1\4 to1\2 the number of internal data channels of a 512GB drive..

    I would copy 20GB images to these drives and they would start off normally.. 500MB/s or so, but after approximately 4GB had been copied the speed dropped to slower than my USB 2.0 flash drives..

    This does not take into account that your SSD may have some internal issues.. You may have better luck with a Crucial or Samsung drive for instance, but I couldn't say.. You would probably get better results with a 1TB drive as it would probably have a larger buffer and more data channels..

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  2. Igor Leyko 111K Reputation points Independent Advisor
    2021-01-07T23:49:12+00:00

    Hi,

    I'm Independent Advisor not Microsoft employee or support person. I have deep enough Windows knowledge and you may trust me. It's a pleasure for me to help others and I'll do all my best to help you.

    What is the exact SSD model? Some SSDs have relatively slow main storage and fast cache. When cache become full the speed slows down dramatically.

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  3. Igor Leyko 111K Reputation points Independent Advisor
    2021-01-09T20:36:06+00:00

    Windows shows 100% disk load so the problem is in disk. Please check response time at those moments. If it increases the disk make internal data reorganising.

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  4. Igor Leyko 111K Reputation points Independent Advisor
    2021-01-08T23:12:19+00:00

    I'm sorry but MQ01ABD100 is not SSD, it is typical 5,400 rpm hard drive. See https://toshiba.semicon-storage.com/us/storage/...

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  5. Anonymous
    2021-01-08T20:32:27+00:00

    Good p.m. The SSD is an Toshiba MQ01ABD100.

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