# [OmniOS-discuss] 4k sectors on a kvm guest

Natxo Asenjo natxo.asenjo at gmail.com
Sat May 4 09:36:18 EDT 2013

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    hi,

    before running a real hardware omnios host I am learning how to use it in a
    kvm vm running on centos.

    The disk performance is quite poor, this is partly due to omnios not using
    virtio hard drives but ide drives. But I think the root zpool is not
    properly aligned either:

    root at testomnios:~# zdb -C rpool | grep ashift
                    ashift: 9

    this should be 12 to be aligned to 4k sectors I understand. Is there a way
    to change this?

    TIA,
    --
    Groeten,
    natxo
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