HP Tru64 UNIX and TruCluster Server Version 5.1B-5 Patch Summary and Release Notes (March 2009)

Patch 27035.00
OSFHWBIN540
• Prevents the state machine performing Bad Block Replacement on a disk for which
BBR is disabled.
• Fixes a rare panic during boot on GS1280/ES80/ES47.
• Fixes a "lock_fault" panic that can happen during system startup and shutdown.
• Corrects the handling of certain disk “not ready” conditions to prevent long I/O
stall times.
• Provides performance enhancements based on the vm_overflow feature added in
V5.1B-3.
• Changes the way page migrations occur on a NUMA system to address poor
performance due to excessive paging.
• Corrects a problem with pagetable page allocations that can leave a thread waiting
indefinitely during a fork operation.
• Corrects the cause of "ubc_wire: hash failed" panics on non-NUMA systems.
• Correct the cause of "not wired" panics with System V shared memory and
bigpages.
• Fixes an issue in the VM subsystem, wherein a page that is not managed by VM
is incorrectly identified as being managed by VM.
• Provides enhanced hwmgr show functionality for scsi path information.
• Fixes a problem in which crash dumps to Fibre Channel swap devices do not
always succeed.
• Allows for control ports to be deleted by the hwmgr utility.
• Fixes a cluster deadlock/hang issue that occurs when a new device is discovered.
• Fixes a problem in which the “hwmgr refresh scsi -all” command does not always
remove stale paths.
• Corrects the cause of a process hang and system panic that occurs when using
System V shared memory and asynchronous I/O.
• Provides preferred path support for active-active, asymmetric storage devices.
• Improves tape read/write command reliability in SANs by allowing the use of
FCP-2 Link Level Error Recovery (LLER) for read and write tape commands if the
destination Fibre Channel port supports LLER.
• Enables Tru64 UNIX to work with tape devices that do not support non-tagged
commands.
• Addresses a potential I/O performance bottleneck in which the tape driver may
select the same path for all tape drives in a system containing multiple HBAs and
multiple tapes. With this change, the tape driver can assign different paths to
different tape drives to improve tape I/O performance.
• Addresses a NUMA memory initialization issue that can lead to system instability.
• Allows systems with multiple paths to a large number of devices to boot faster.
3.4 Summary of Base Operating System Patches 157