Red Hat Bugzilla – Bug 987693
[thin] Thin snapshot creation fails when pool created with --zero n
Last modified: 2013-11-21 18:26:03 EST
Description of problem: Can not create thin snapshots when pool is created with --zero n. Version-Release number of selected component (if applicable): lvm2-2.02.99-0.367.el6_4.x86_64 (upstream) How reproducible: 100% Steps to Reproduce: #!/bin/bash VG=vg POOL=pool ORIGIN=origin SNAP=snap OPTS="--zero n" lvcreate --thin -L 2G $OPTS ${VG}/${POOL} lvcreate --virtualsize 500M --thinpool ${VG}/${POOL} -n ${ORIGIN} lvcreate -s /dev/${VG}/${ORIGIN} -n ${SNAP} -vvvv &> lvcreate-s-failed.$(date "+%Y%m%d-%H%M%S").out Actual results: Last lvcreate fails as snap device is not activated and can not be written to: /dev/vg/snap: not found: device not cleared Aborting. Failed to wipe snapshot exception store. Expected results: Pass Additional info:
Fixed regression introduced in 2.02.94 upstream with: https://www.redhat.com/archives/lvm-devel/2013-July/msg00210.html Using snapshots on non-zeroed thin pool lead to cleared 4KB header of such snapshot.
Verified with: lvm2-2.02.100-1.el6.x86_64 #!/bin/bash VG=vg POOL=pool ORIGIN=origin SNAP=snap OPTS="--zero n" lvcreate --thin -L 2G $OPTS ${VG}/${POOL} lvcreate --virtualsize 500M --thinpool ${VG}/${POOL} -n ${ORIGIN} lvcreate -s /dev/${VG}/${ORIGIN} -n ${SNAP} -vvvv &> lvcreate-s-failed.$(date "+%Y%m%d-%H%M%S").out Executed script: Logical volume "lvol0" created Logical volume "pool" created Logical volume "origin" created
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-1704.html