Protecting VM with Premium SSD

Michal Sumega 41 Reputation points

Hello all,

I've been doing some research and are still a bit confused about this...

I'm a bit lost in VM with Premier SSD. I'm not trying to achieve better SLA by putting VMs to AS or AZ, I'm just wondering in what situation I may loose the VM and data on it. I've found that a Single VM with Premium SSD has SLA 99.90%, but this is not what I'm trying to find out. Let's say it is a VM running a company finance software with a small SQL database and it is not used on a daily bases at all..

So, I have a VM with Premium SSD, which means that the data are replicated locally only, as I've found out. Now:

  • is this within the same fault domain?
  • if there is a disaster - the Azure DC is hit by a meteor - is MS taking some backups and they are able to restore/rebuild the DC and data including my VM?... and I will see the VM alive again :)? Or the VM is gone for good, and if I do not have backup, I'm done.

... I know this is probably quite stupid question, but was trying to find an answer for a while already :)


Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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Azure Disk Storage
Azure Disk Storage
A high-performance, durable block storage designed to be used with Azure Virtual Machines and Azure VMware Solution.
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  1. JessicaH-MSFT 246 Reputation points Microsoft Employee

    Hi Michal,

    Not a stupid question at all. Keeping your data safe and available is important work.

    Although your VMs and disks are normally protected from localized failures, additional steps are necessary to protect your workload from region-wide catastrophic failures, such as a major disaster, that can affect your VM and disks.

    For regional disaster recovery, you must back up your IaaS VM disks to a different region.

    There are a lot of options to protect your data and make sure it is available when you need it. More information can be found here:

    I hope this helps!


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  2. K Sheahan Kularathne 426 Reputation points


    This is common question, Azure Copy "Locally redundant storage (LRS) replicates your data three times within a single physical location in the primary region. LRS provides at least 99.999999999% (11 nines) durability of objects over a given year."

    They keep a copy of your data in case of disaster. They use that backup in case of a disaster to give Access to the customer within the agreed SLA. If you want something more than that, Like You need to access your data During the Disaster even before they do recovery of there Data Center, you have to choose other Redundancy options. Please find the below link for all the Redundancy options related to the Manage Disk.

    1 person found this answer helpful.