BU050110_EW01
 
HP Tru64 UNIX 5.1B-2/PK4 Tape Handling and Other drd Problems

Tru64 UNIX

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DESCRIPTION
This Early Release Patch (ERP) fixes several tape-related and other drd problems found in Tru64 UNIX 5.1B-2/PK4:

1. On deleting a tape device, the ref counts for the device were found to be incorrect. These incorrect ref counts prevented the device from being deleted properly.
2. The DRD_KGS_WAIT_TRANS_DONE flag was left set after the transaction was done. This is a minor problem that could have been caused due to the problem with the ref counts.
3. A drd ref count is left on when a cluster member loses access to a tape and then regains it. This could prevent a customer from being able to delete the tape when the cluster regains from the transition.
4. On certain types of media errors, a tape device could be left in an unusable state. The device will always return "busy" even though no transaction is in progress on that device.
5. When an upgrade is done to TCR 5.1B-2/PK4, the cluster could lose access to backplain RAID devices (e.g., KZPAC, KZPCC, etc).
6. A kernel memory fault panic experienced when no local devt is available for a device that is locally accessible.
7. A problem experienced when all paths to a disk are lost and a persistent reservation (i.e., barrier) is in progress.
8. A deadlock situation in open/close when all paths to a disk are lost.
9. A deadlock problem experienced when local connectivity is regained when an open is in progress.

Note: This ERP Kit replaces (installs over) ERP Kit
TCRKIT0023955-V51BB25-E-20041017, which provides a fix for problem 5. above.

SCOPE
The following product version is affected:

• HP Tru64 UNIX 5.1B-2/PK4

Target Audience
TruCluster systems with tape devices running HP Tru64 UNIX V5.1B with 5.1B-2/PK4.

RESOLUTION
HP is releasing the following Early Release Patch kit (ERP) publicly for use by any customer. The ERP uses dupatch to install and will not install over any Customer Specific Patches (CSPs) that have file intersections with the ERP.

The fixes contained in the ERP kit is scheduled to be available in the following mainstream patch kit:

• HP Tru64 UNIX 5.1B-3/PK5

Early Release Patches

The ERP distributes the following mod file:

/usr/opt/TruCluster/sys/drd.mod

An ERP kit is available for the following version.

HP Tru64UNIX 5.1B-2/PK4
ERP Kit Name: TCRKIT0024683-V51BB25-E-20050116
Kit Location:
http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=TCRKIT0024683-V51BB25-E-20050116