HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes HP-UX 11iv3 (August 2011)

Table 1 LVM Fixes in HP-UX 11i v3 August 2011 Web Release (continued)
DescriptionDefect ID
In a 2 node cluster, if any server crash happened during deactivation of the volume group
in the server node, subsequent vgdisplay on the client node hangs.
QXCR1001145047
1
In a 4 node cluster, during heavy IO load and intermittent disk failures, one of the client
panics with the following stack trace:
QXCR1001152106
1
panic+O4410
lvmp:slvmp_dequeue_done_requests+0x1a0
lvmp:slvmp_process_commit_msg+0x160
lvmp:slvmp_commit_msg_hdlr+0x210
lvmp:lvmp_kd_daemon+0x1b0
lvmp:lvmp_kd_fork1+0x210
lvmp:lvmp_kd_fork+0x90
lvmp:lvmp_kd_init+0x1a0
lvmp:lvmp_init+0x880
lvmp:lvmp_load+0x90
mod_load_helper+0x2a0
modld+0x2d0
kc_dispatch_helper+0x9a0
kc_dispatch+0x550
gio_install_drivers+0x50
io_virt_mode_config
1
This defect fix is only available in the August 2011 web release and not in the September 2011 release.
Known issues and limitations
This section provides a list of known issues and limitations as known to HP at time of publication.
If workarounds are available, they are included.
Known issues
lvchange -M y on mirrored LV with snapshot hangs and causes I/Os on LV to hang
Defect ID: QXCR1001131631
Problem: While running lvchange to set the mirror write cache flag ON on a
mirrored logical volume with snapshot(s) when the logical volume is
open and I/Os to this logical volume are in progress, the lvchange
command could hang, causing I/O on the original logical volume
to hang.
Severity: Critical
Corrective Action: As mentioned in the manpage for lvchange -M, ensure that the
logical volume with snapshot(s) is not opened while attempting to set
the mirror write cache flag.
LVM snapshot shows sync'ed even if the disk is disabled
Defect ID: QXCR1001132689
Problem: Logical volume status of fully allocated snapshot is shown as
available/sync'ed when the disk where the snapshot is present is not
accessible.
Severity: Serious
Corrective Action: Currently, none.
Known issues and limitations 7