HP 3PAR OS 3.1.2 MU5 Release Notes

Other Enhancements
• Provides the ability to force the shutdown of the HP 3PAR StoreServ Storage node for
maintenance if there are active tasks running without having to manually stop all the tasks
before shutting down the node for maintenance.
HP 3PAR Remote Copy software now leverages the HP 3PAR Thin Built-In ASIC to detect and
eliminate the remote replication of zero pages during initial synchronization and ongoing
synchronous replication. As a result, precious remote copy link bandwidth is utilized efficiently by
replicating non-zero written data only. This capability also enables near-instant initial synchronization
of new volumes that are added to a remote copy group.
Special capacity savings stem when remote copy bandwidth optimization is coupled with HP 3PAR
Thin Conversion and Thin Persistence Software. Fully provisioned, “fat” source volumes can be
converted simply and rapidly to higher efficiency, “thin” target volumes during remote replication
while making efficient use of remote copy bandwidth. Capacity associated with zero pages on
the source volume is eliminated on the replication target volume. Thin Persistence keeps the thin
target volume as lean and efficient as possible.
Modifications to the OS
The following items are addressed in this release:
DescriptionItemIssue ID
Limit the rate at which REPORTED LUNS DATA HAS CHANGED Unit
Attentions are raised to an SCSI initiator to a maximum of one in any
thirty second interval to avoid overwhelming the host.
Rate Limit LUNs Changed Unit
Attentions
39805
A software defect in the CPG growth area causing the IMC to
incorrectly display CPG as failed has been fixed.
IMC shows CPG as failed although
the CPG can grow
46335
Addresses an issue in earlier software releases where Emulex HBA
ports configured in host/fabric mode could be switched to initiator
Configure fabric ports in target mode
after node replacement
46983
mode after node replacement. Fibre Channel HBA ports configured
with 'point' connection type for fabric topology will be switched to
target mode, as 'point' connection type is supported only in target
mode.
The time it takes to transition a chunklet into logging state is now 20
seconds, and the scsi timeout is now 5 seconds (from 40 and 10
Speeding up the chunklet state
transition into logging state
50874
respectively). In addition, Once a disk has one chunklet in logging
mode, additional chunklets will transition into logging state after a
single write failure.
When a CPG fails to grow an alert is raised, e.g:
Id : 44
State : New
Dynamic Logic: IMC keeps showing
CPGs degraded
53517
(also
53613)
Message Code: 0x270009
Time : 2010-07-29 03:12:54 PDT
Severity : Critical
Type : CPG growth failure
Message : CPG a1 SD grow command: createald -wait 0 -cpsd a1 -ha
disk -p -dk 70-79 -devtype NL -n tp-10-sd-2 -sz
1638 : Failed with: There are no disks with free space in
the system
There was an issue where if later the CPG could grow then the alert
was not cleared correctly. This fix clears the alert appropriately.
After a CPG has failed to grow and then subsequently succeeded,
then the CPG growth failure flag is erroneously left set. This results in
Clear IMC CPG growth failure flag53930
the CPG being displayed as growth failed in the IMC. The flag is now
reset appropriately after the CPG grow succeeds.
Raid1 NL write performance will be less due to DIF on HP 3PAR
StoreServ Storage 7000 systems.
Issue to track DIF performance
findings for NL drives. Primary area
54424
of performance loss is expected
(RAID1 volumes).
8 HP 3PAR OS 3.1.2 GA Release Notes