scsi vs non scsi disk performance

Discussion in 'Virtual PC' started by jg, Jan 28, 2006.

  1. jg

    jg Guest

    It has been said in virtual server group that emulated SCSI is faster than
    non emulated SCSI virtual disk on Virtual disk with VMadditions.


    I wonder if that applies to Virtual PC 2004 guests?

    Furthermore, what about a physical host of SATA Raid, what can be done to
    improve the VMs IO? Emulated SCSI drivers?

    Someone said installing SATA Raid drivers in the VIM would not help. But
    then
    someone mentioned performance gains by using SCSI drivers and real
    physical SATA drives in the server group.
     
    jg, Jan 28, 2006
    #1
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  2. jg

    Robert Comer Guest

    It has been said in virtual server group that emulated SCSI is faster than
    Virtual PC doesn't emulate a SCSI device, so the answer is no.
    Virtual PC doesn't see the underlying hardware, only the emulated devices,
    so you can't do that.

    The best things to do to increase disk performance is to get the fastest
    disks you can and to put the VM on a drive that isn't used much by the host.
    (so definitely not on the system drive/partition) Having more RAM on the
    host so it's not swapping much helps too.
     
    Robert Comer, Jan 28, 2006
    #2
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