# [OmniOS-discuss] Problem with passed-through HBA

Richard Elling richard.elling at richardelling.com
Mon Apr 29 17:10:37 EDT 2013

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    This is a power management issue. The drive firmware can be set to handle the
    power on explicitly or not. See the power-condition setting in the sd(7d) man page.

    I've seen this behaviour from Dell disks, mostly, but I wouldn't be surprised if other
    vendors also change this default.
     -- richard

    On Apr 29, 2013, at 11:54 AM, "Dan Swartzendruber" <dswartz at druber.com> wrote:

    >
    > I have an IBM M1015 HBA connected to a JBOD chassis with 6 SAS disks in a
    > 3x2 raid10.  I was running this under ZFS on linux with no issues
    > (virtualized under ESXi 5.1).  I installed OmniOS with the latest updates,
    > shutdown the Ubuntu ZoL guest, removed the HBA from its config, added the
    > PCI card to the OmniOS guest and powered it up.  Only 4 of the 6 disks
    > come up, and as luck (or maybe not luck?) would have it, both were in the
    > same vdev, so 'no pool for you!'  I was freaking out about losing data -
    > tried swapping drives, booting the guest with drives added 1 by 1 to no
    > avail.  The errors I see in the log say something about 'device X failed
    > to power on'.  These messages are from the mptsas driver.  Out of
    > desperation, I shutdown the OmniOS guest, moved the HBA back to the Ubuntu
    > appliance and booted it.  All 6 drives spin up just fine, and I have a
    > perfectly healthy pool.  I can only assume it's a bug in the Illumos
    > mptsas driver (and/or some evil interaction between that driver and PCI
    > Passthrough?)  I would love to switch to OmniOS, since it's more stable
    > than ZoL (at least right now), and easier to configure.  But not having a
    > usable pool is an obvious showstopper :(  And please don't suggest
    > skipping passthrough and passing all 6 drives in via RDM...
    >
    > _______________________________________________
    > OmniOS-discuss mailing list
    > OmniOS-discuss at lists.omniti.com
    > http://lists.omniti.com/mailman/listinfo/omnios-discuss

    --

    Richard.Elling at RichardElling.com
    +1-760-896-4422

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