VERITAS Volume Manager 4.1 Release Notes (5900-0591, March 2010)

VERITAS Volume Manager 4.1 Release Notes
Known Problems and Workarounds
Chapter 1 35
Hot-Relocation Issues
Impact of Hot-Relocation on Performance
Except for rootvol and swapvol, hot-relocation does not guarantee the same layout of data or
performance after relocation. It is therefore possible that a single subdisk that existed before
relocation may be split into two or more subdisks on separate disks after relocation (if there is
not enough contiguous space on a single disk to accommodate that subdisk).
Disk Information in Notification Messages
When a disk failure occurs, the hot-relocation feature notifies the system administrator of the
failure and any relocation attempts through electronic mail messages. The messages typically
include information about the device offset and disk access name affected by the failure.
However, if a disk fails completely or a disk is turned off, the disk access name and device
offset information is not included in the mail messages. This is because VxVM no longer has
access to this information.
Cluster Functionality Issues
Volume in SYNC state
If a node leaves the cluster while a plex is being attached to a volume, the volume can remain
in the SYNC state indefinitely. To avoid this, after the plex attach completes, resynchronize
the volume manually with the following command:
# vxvol -f resync volume
RAID-5 Volumes
VxVM does not currently support RAID-5 volumes in cluster-shareable disk groups.
File Systems Supported in Cluster-Shareable Disk Groups
The use of file systems other than VERITAS Storage Foundation Cluster File System
(SFCFS) on volumes in cluster-shareable disk groups can cause system deadlocks.
Reliability of Information About Cluster-Shareable Disk Groups
If the vxconfigd program is stopped on both the master and slave nodes and then restarted
on the slaves first, VxVM output and VEA displays are not reliable until the vxconfigd
program is started on the master and the slave is reconnected (which can take about 30