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Date:      Wed, 06 Jan 2016 19:12:41 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-amd64@FreeBSD.org
Subject:   [Bug 205974] can't detach devices from zpool
Message-ID:  <bug-205974-6@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D205974

            Bug ID: 205974
           Summary: can't detach devices from zpool
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: lifanov@mail.lifanov.com
                CC: freebsd-amd64@FreeBSD.org
                CC: freebsd-amd64@FreeBSD.org

I migrated a zpool (mirror) from two 1T drives to two 3T drives.
It had two (also mirrored) log devices.

I detached both mirror devices, one at a time, and then replaced both drive=
s,
one at a time with autoexpand turned on.

Then I re-attached the log devices in the same mirrored configuration.

The pool is healthy and seems to be working normally, but I can't detach
devices from it anymore. Any time I try to detach any of the four devices, =
the
system becomes completely unresponsive.

The software version is the same. The only configuration difference is that=
 the
new pool has 4k blocks versus 512b and also has a different pool name.

After a forced reboot, pool is marked as degraded and I can plug the device
back in and wait for a resilver. The device doesn't become detached.

I can't produce a vmcore because the system becomes completely unresponsive=
 but
doesn't crash.

--=20
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