HP 3PAR StoreServ 7450 4-node HP 3PAR OS 3.1.2 Release Notes - Page 8

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: Issue ID Item Description 39805 Rate Limit LUNs Changed Unit Attentions 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. 46335 IMC shows CPG as failed although A software defect in the CPG growth area causing the IMC to the CPG can grow incorrectly display CPG as failed has been fixed. 46983 Configure fabric ports in target mode Addresses an issue in earlier software releases where Emulex HBA after node replacement ports configured in host/fabric mode could be switched to initiator 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. 50874 Speeding up the chunklet state transition into logging state 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 respectively). In addition, Once a disk has one chunklet in logging mode, additional chunklets will transition into logging state after a single write failure. 53517 (also 53613) Dynamic Logic: IMC keeps showing CPGs degraded When a CPG fails to grow an alert is raised, e.g: Id : 44 State : New 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. 53930 54424 Clear IMC CPG growth failure flag After a CPG has failed to grow and then subsequently succeeded, then the CPG growth failure flag is erroneously left set. This results in the CPG being displayed as growth failed in the IMC. The flag is now reset appropriately after the CPG grow succeeds. Issue to track DIF performance findings for NL drives. Primary area of performance loss is expected (RAID1 volumes). Raid1 NL write performance will be less due to DIF on HP 3PAR StoreServ Storage 7000 systems. 8 HP 3PAR OS 3.1.2 GA Release Notes