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Direct Attached Storage

Отвечено Direct Attached Storage

  • 2012年4月27日 19:34
     
     
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    I have a direct attached storage connected to one of my Hyper-V hosts.  I followed the Hyper-V Planning and Deployment Guide to make sure that the DAS showed up as an logical drive on the virtual machine.  We are going to use this virtual machine as a file server (2008 R2 sp1), and all the data will be stored on the logical F: drive (up to nine TB).  My question is, if this F: drive has 6 or 7 TB of data stored on it,  will there be issues with the VHD becoming corrupted?  Also when we need to move the virtual machine to a new host a few years down the road, my understanding is that as long as the new host has a comparable DAS, that a migration will work fairly smoothly.  Is that correct since the VHD is not really dependent on specific hardware?
     

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  • 2012年4月27日 23:00
     
     
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    I have a direct attached storage connected to one of my Hyper-V hosts.  I followed the Hyper-V Planning and Deployment Guide to make sure that the DAS showed up as an logical drive on the virtual machine.  We are going to use this virtual machine as a file server (2008 R2 sp1), and all the data will be stored on the logical F: drive (up to nine TB).  My question is, if this F: drive has 6 or 7 TB of data stored on it,  will there be issues with the VHD becoming corrupted?  Also when we need to move the virtual machine to a new host a few years down the road, my understanding is that as long as the new host has a comparable DAS, that a migration will work fairly smoothly.  Is that correct since the VHD is not really dependent on specific hardware?

    1) You don't really need to export data (put shares) on what you keep inside VHDs.

    2) Yes, virtual machines are movable and independent of hypervisor-running hardware.

    3) With Windows 8 / Hyper-V 3.0 you'd be able to migrate VM from DAS to DAS w/o creating cluster and w/o shared storage. For now it would be export only.

    -nismo

     
  • 2012年4月28日 1:57
     
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    Hello,

    I almost always use a VHD, as I prefer the abstraction benefit over pass-through storage.  Note that the maximum size of a VHD in Windows 2008 R2 is 2 TB.  You will be able to move the VHD to the new storage location in the future.

    In the case of Windows Server 2012 the maximum size of a virtual hard disk (now VHDX) is 64 TB. 

    Nathan Lasnoski

    http://blog.concurrency.com/author/nlasnoski/

     
  • 2012年4月30日 15:07
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    Hi,

    make sure that the DAS showed up as an logical drive on the virtual machine.
    >> It seems that you assign the DAS to the virtual machine as pass-through disk instead of putting VHD file on the DAS. If there is any misunderstanding, please feel free to let me know.

    If you use pass-through disk for the virtual machine, you can attach the same disk to the new virtual machine on the new Hyper-V host machine. If you used a VHD file for the virtual machine, you can do the same thing like pass-through disk. At this moment, the maximum size of VHD file is 2040GB, you can’t beyond it. By the way, VHD file is a file, it may corrupt if there are some issue with it, such as a physical disk corrupt, sometimes caused by antivirus applications. So it is recommended that you perform a regular backup for your data.