ECC/LRC pinned data may occur if cache blockades on SE9990/SE9985

Asset ID:	1-73-1000171.1
Update Date:	2012-08-20
Keywords:

Solution Type FAB (standard) Sure

Solution 1000171.1 : ECC/LRC pinned data may occur if cache blockades on SE9990/SE9985

Related Items


Sun Storage 9990 System
 Sun Storage 9985 System

Related Categories


PLA-Support>Sun Systems>Sun_Other>Sun Collections>SN-OTH: Sun FAB
 .Old GCS Categories>Sun Microsystems>Sun FAB>Standard>Reactive

PreviouslyPublishedAs
200220

Product
Sun StorageTek 9990 System
Sun StorageTek 9985 System

Impact

When one side of cache is blocked due to a cache failure, ECC/LRC PIN data can occur. In the cache duplication process at the time of writing data to parity groups, a cache failure can occur, and an improperly duplicated extent will be specified due to a micro-program failure.

Contributing Factors
This issue can occur when both following conditions are met:

RAID1 parity groups exist in the subsystem
A cache failure blocks one side of cache

Affected MICRO-PROGRAM VERSIONS:

Microcode version equal to or greater than 50-04-48-00/00 can be affected by this issue.

Resolution

New release of microcode will provide a countermeasure to prevent the issue. The resolution for this issue is to install:

SE9990 (USP tagmaStore) MC 50-04-49-00/00 and above.
SE9985 (USP/NSC55) MC 50-05-23-00/00 and above.

Comments

Abbreviations used in this FIN.

ECC: Error correction code
LRC: Longitudinal Redundance Checksum
MC : Microcode
NSC: Network Storage Controller
USP: Universal Storage Platform

Related Information

Manual: SE99x0 Maintenance Manuals
URL: http://sejsc.ebay/AL/USP_045637R2.htm
http://sejsc.ebay/AL/USP_045637_R500-PinnedData.pdf
http://pts-storage.us.oracle.com/products/T99x0/documentation.html
http://sccc-storage.emea:5071/cgi-bin/microcode/request.cgi
Other: Alert USP_045637

Previously Published As: 102199

Internal Contributor/submitter: [email protected]
Internal Eng Business Unit Group: KE Authors
Internal Eng Responsible Engineer: [email protected]
Internal Services Knowledge Engineer: [email protected]

Internal Kasp FAB Legacy ID: 102199

Internal Sun Alert & FAB Admin Info
Critical Category:
Significant Change Date:
Avoidance: Service Procedure
Responsible Manager: null
Original Admin Info: null

Product_uuid
15644879-f179-11d8-ab63-080020a9ed93|Sun StorageTek 9990 System
73084edc-dc32-11d9-8a74-080020a9ed93|Sun StorageTek 9985 System

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