Veritas Storage Foundation 5.1 SP1 for Oracle RAC Release Notes (5900-1513, April 2011)

Performance recommendation for space-optimized volume snapshots
For minimal performance impact, Symantec recommends that the Space Optimized
Snapshots (SOS) be created only of data volumes. A mirror breakoff snapshot
should be created of the Oracle log volume. The log volumes are typically small
in size and do not have significant space overhead.
Unsupported volume location scenarios
The ocrvol volume and votevol volume cannot exist in the same shared disk group
as that of the Oracle datafiles. However, you can allow for this scenario when you
manually configure Oracle service groups.
Oracle Disk Manager (ODM) limitation
Oracle Disk Manager (ODM) uses the Quick I/O driver for asynchronous I/O. Do
not turn off the Quick I/O mount option, which is the default.
cfsmntadm command does not verify the mount options (2078634)
You must confirm if the mount options are correct which are then passed to the
cfsmntadm command. If the mount options are incorrect, the mount fails and the
CFSMount resource will not come online. You can check the VCS engine log file
for any mount failure messages.
Replication in a shared environment
Currently, replication support is limited to 4-node cluster applications.
Storage Checkpoint and Database FlashSnap limitation
The following are the limitations of Storage Checkpoint and Database FlashSnap:
You cannot create a clone database using a mounted Storage Checkpoint.
If you create an Oracle instance using the spfile option, you must run the
dbed_update command before you can successfully perform any Storage
Checkpoint or Database FlashSnap functions.
Storage Checkpoints require file system layout version 6 or version 7. Use the
vxupgrade(1M) command to check the current layout version and to change
the layout version, if necessary. When upgrading a CFS file system, issue the
command from the primary node. Note that after you upgrade a system to
layout version 6 or version 7, the file system is no longer compatible with the
older VxFS file systems.
Storage Foundation for Oracle RAC Release Notes
Software limitations
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