Seeing this in RHEL6 as well.
Aug 4 17:28:51 taft-03 lvm[1287]: Trying to up-convert to 2 images, 1 logs.
Aug 4 17:28:56 taft-03 lvm[1287]: Monitoring mirror device TAFT-ha1 for events.
Aug 4 17:28:56 taft-03 lvm[1287]: Another thread is handling an event. Waiting...
Aug 4 17:28:56 taft-03 lvm[1287]: 1 missing and now unallocated Physical Volumes removed from VG.
Aug 4 17:28:57 taft-03 lvm[1287]: TAFT/ha1: Converted: 0.0%
Aug 4 17:28:59 taft-03 rgmanager[4467]: [lvm] Stripping tag, taft-03
Aug 4 17:29:00 taft-03 rgmanager[20095]: Service service:halvm is stopped
Aug 4 17:29:12 taft-03 lvm[1287]: ABORTING: Mirror percentage check failed.
Aug 4 17:29:12 taft-03 lvm[1287]: Repair of mirrored LV TAFT/ha1 failed.
Aug 4 17:29:12 taft-03 lvm[1287]: Failed to remove faulty devices in TAFT-ha1.
Aug 4 17:29:12 taft-03 lvm[1287]: dm_task_run failed, errno = 6, No such device or address
Aug 4 17:29:12 taft-03 lvm[1287]: TAFT-ha3 disappeared, detaching
Aug 4 17:29:12 taft-03 lvm[1287]: dm_task_run failed, errno = 6, No such device or address
Aug 4 17:29:12 taft-03 lvm[1287]: No longer monitoring mirror device TAFT-ha3 for events.
Aug 4 17:29:12 taft-03 lvm[1287]: dm_task_run failed, errno = 6, No such device or address
Aug 4 17:29:12 taft-03 lvm[1287]: TAFT-ha2 disappeared, detaching
Aug 4 17:29:12 taft-03 lvm[1287]: TAFT-ha1 disappeared, detaching
Aug 4 17:29:12 taft-03 lvm[1287]: No longer monitoring mirror device TAFT-ha2 for events.
Aug 4 17:29:12 taft-03 lvm[1287]: No longer monitoring mirror device TAFT-ha1 for events.
Aug 4 17:29:12 taft-03 lvm[1287]: dm_task_run failed, errno = 6, No such device or address
Aug 4 17:29:12 taft-03 lvm[1287]: TAFT-ha1 disappeared, detaching
Aug 4 17:29:12 taft-03 lvm[1287]: No longer monitoring mirror device TAFT-ha1 for events.
2.6.32-174.el6.x86_64
lvm2-2.02.83-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
lvm2-libs-2.02.83-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
lvm2-cluster-2.02.83-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
udev-147-2.35.el6 BUILT: Wed Mar 30 07:32:05 CDT 2011
device-mapper-1.02.62-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-libs-1.02.62-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-event-1.02.62-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
device-mapper-event-libs-1.02.62-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
cmirror-2.02.83-3.el6 BUILT: Fri Mar 18 09:31:10 CDT 2011
Comment 3RHEL Program Management
2011-10-07 15:55:24 UTC
Since RHEL 6.2 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.
Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.