Which is better for virtualization, RAID5 or Single drive?

Posted on 2012-09-19
Last Modified: 2012-09-23
I have 3 VMs (on ProxMox).  Will I get better IO performance putting all 3 on a hardware RAID5 array or using a single drive for each VM?  I am using SATA drives not SAS.
Question by:pdering
    LVL 116

    Accepted Solution

    More Drives = More Spindles = More Performance = More IOPS.

    Combining and striping across 3 drives, should perform better than a single drive.

    See this post for an explaination about IOPs.

    SATA: 70-90 IOPs per disk.
    LVL 23

    Expert Comment

    by:Ayman Bakr
    Moreover, RAID 5 will provide you with more reliability as fault tolerance is depicted with distributed parity check.

    If you can provide for 4+ disks you can have high reliability with high performance using RAID 10, 50 or 0+1. RAID 50 will require at least 6 drives but has high I/O rates and data transfer performance.

    For more information on RAIDs see this link:

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