Raid setup on  Hyper V

Posted on 2011-05-06
Last Modified: 2013-11-06
I have an HP proliant ml350 g6 origianlly designed to run a sql 2005 app. 6Gb RAm, 6*72Gb SCSI drives. 2 other server are getting old (these run low intensity apps) so | thought I could use this server as the host for Hyper V, then guest the 3. I know I'd need to add RAM. What is the best Raid config for this? Raid 1 for OS on 2 drives and RAid 5 the other 4 drives? That was my original intent when built only for SQL.
Thnks in advance.


Question by:crseymour
    LVL 8

    Accepted Solution

    It's generally recommended to use RAID1 for the OS and RAID5 for most other things other than the OS.

    If you're going through a single RAID controller the best thing would probably be to add as many hard drive spindles in RAID5 as you can afford.


    General Purpose Web Server
    -RAID1 for OS and everything

    Hyper-V (without a SAN)
    -RAID1 OS
    -RAID5 for the virtual machines

    -RAID1 OS
    -RAID1 SQL Transaction Logs
    -RAID5 for the SQL databases
    LVL 7

    Assisted Solution

    RAID 1 for OS on 2 drives and RAID 5 for data on the others should be a good choice.

    As the OS is actually for Hyper-V engine only and no big partition is required, you may consider building a single RAID 5 virtual disk on the 6 drives (5 x active + 1 x hot spare), and installing OS on a small volume/partition on the disk while leaving the other volumes for data. this may allow up to 3 disk failures and save more space for data.
    LVL 41

    Assisted Solution

    RAID 5 has a pretty serious write penalty. I would do a single RAID10 with all drives and then create two partitions: 1 for the Windows 2008 R2 or Hyper-V Server 2008 R2 host and then the second partition to hold all VMs.
    LVL 1

    Expert Comment

    by:Patrick Nunez
    Take a look at this article.

    RAID10 woud be ideal but you lose 1/2 the disk storage.

    Author Closing Comment

    Interesting answers; I thought their would be more of a consensus on the procedure. I have small user base using this, and think I'll go with Raid 1for the OS and Raid 5 for the other drives.
    Thanks for the quick answers.

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