# [OmniOS-discuss] ZFS pool allocation remains after removing all files

Rune Tipsmark rt at steait.net
Thu Oct 9 18:25:51 UTC 2014

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    On OmniOS v11 r151010

    -----Original Message-----
    From: Dan McDonald [mailto:danmcd at omniti.com]
    Sent: Thursday, October 09, 2014 11:11 AM
    To: Rune Tipsmark
    Cc: Richard Elling; Filip Marvan; omnios-discuss at lists.omniti.com
    Subject: Re: [OmniOS-discuss] ZFS pool allocation remains after removing all files

    On Oct 9, 2014, at 1:51 PM, Rune Tipsmark <rt at steait.net> wrote:

    > I am happy to test in our environment, we have some semi-live demo servers (10+ virtual servers) that are being used as in a real production environment with load on them etc.
    >
    > If some VAAI works, should I be able to see it in VMware?

    As "hardware assisted erase", I believe.

    > Does it make any difference I use SRP to connect the LU's?

    My VMware is weak.

    > My VAAI status for each LUN is as follows:
    >
    > naa.600144f0908abf5d00005391079d0008
    >   VAAI Plugin Name:
    >   ATS Status: unsupported

    Corresponds to ATS, which is in Nexenta only for now.

    >   Clone Status: unsupported

    Corresponds to XCOPY, which is in Nexenta only for now.

    >   Zero Status: supported

    Corresponds to WRITE_SAME, which is in all illumos distros.

    >   Delete Status: unsupported

    Corresponds to UNMAP, which is in all illumos distros.

    I'm surprised "delete status" isn't marked as supported, but I do seem to recall a recent push disabled UNMAP (delete status) by default.  Let me look...

    ... Yeah... there's a global "zvol_unmap_enabled" now.  It *should* be true by default, though.  Which OmniOS revision are you on?

    Dan

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