Hyper V disk config

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This topic contains 5 replies, has 5 voices, and was last updated by Avatar ThaHomie 6 years, 2 months ago.

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    Ghostrocket
    Member
    #161508

    Hi all

    We have a customer that we are building a server for. Its going to be Hyper V host with two guests. Due to the costs we hvae 4 600GB SAS disks.

    Initially I was looking at a RAID1 for each guest, however long term it doesnt really lend itself if we want to add a 3 guest. However as one of the guests will manage Exchange I am looking for the best performance.

    Plus I realise that Hyper V doesnt leave a huge footprint, is it wise to have this installed on the same set of disks as a guest ?

    Any advice would be great or links.

    Thanks

    Avatar
    James Haynes
    Member
    #251960

    Re: Hyper V disk config

    4 drives doesnt really lend itself to an optimal configuration…

    i think the first thing you need to do is a load test to determine what kinda performance you will require.

    this also means that if your going to use the 4 drives, you have no hot spare for either group… because i would definitely be using to groups for the servers in question. the exchange box is going to need to have decent I/O rates depending on your user base….

    its hard to suggest how to set this up with only 4 physical drives…

    Avatar
    joeqwerty
    Moderator
    #304039

    Re: Hyper V disk config

    1. The guests don’t (or shouldn’t) access the physical disks directly. You’ll install Hyper-V on the RAID array(s), then you’ll create virtual hard drives for the guests.

    2. Personally I would configure two RAID 1 sets or one RAID 10 set.

    Avatar
    Virtual
    Member
    #334490

    Re: Hyper V disk config

    If you will only be using DAS, you only have the option to create VHDs.

    For Exchange environments, I tend to use a VHD for the boot/system partition and then a SAN to provide the LUNs for the Exchange database/log files. This is configured as a pass through disk on the Hyper-V Guest VM.

    What Exchange version are you using as I/O requirements are very different. Also, there are tools that allow you to assess the I/O be applying the relevant load prior to migrating production Mailboxes to Exchange, such as the JetStress tool.

    Also, ensure that the VHD is a fixed disk.

    Avatar
    ThaHomie
    Member
    #384804

    Re: Hyper V disk config

    Just wanted to say thanks for all your replies much appreciated :)

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    Virtual
    Member
    #334501

    Re: Hyper V disk config

    Glad to help and thanks for posting back. :-)

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