Devices may become unavailable when attempting USP Non-Stop micro-program exchange on SE9985 or SE9990 systems

Asset ID:	1-73-1000865.1
Update Date:	2010-08-31
Keywords:

Solution Type FAB (standard) Sure

Solution 1000865.1 : Devices may become unavailable when attempting USP Non-Stop micro-program exchange on SE9985 or SE9990 systems

Related Items


Sun Storage 9990 System
 Sun Storage 9985 System

Related Categories


GCS>Sun Microsystems>Sun FAB>Standard>Reactive

PreviouslyPublishedAs
201146

Product
Sun StorageTek 9990 System
Sun StorageTek 9985 System

Impact

Non-Stop microcode exchanges can not be performed on Fibre Channel ports with the following microcode combinations when connected to (AIX/MSCS/Tru64/SUN (with HA software)) hosts issuing the 'reserve' command:

The DKCMAIN micro-program version before exchange:

lower than 50-04-47-00/00
lower than 50-05-07-00/00
lower than 50-05-21-00/00

The DKCMAIN micro-program version after exchange:

50-04-47-00/00 or higher (within 50-04-4X range)
50-05-07-00/00 or higher (within 50-05-0X range)
50-05-21-00/00 or higher (within 50-05-2X range)

Symptoms

Root Cause

Microprogram deficiency in handling HA Software 'reserve' commands during Non-Stop microprogram exchange (Microcode Upgrades in ranges outlined in "Description Section" above.) When the 'reserve' command, which was received during an I/O takeover in the Non-Stop micro-program exchange, is executed, invalid reserve information will be set. This may result in devices becoming inaccessible.

Workaround

Resolution

The modified DKCMAIN micro-program versions are as follows:

50-04-47-00/00 or higher (within 50-04-4X)
50-05-07-00/00 or higher (within 50-05-0X)
50-05-21-00/00 or higher (within 50-05-2X)

If these versions are not installed when the Non-Stop SCSI micro-program exchange is started, this issue may occur (Refer then to "Corrective Action"). After upgrading to these versions, then subsequent upgrades to higher level Microcode can be performed using the Non-Stop method without issue.

To resolve this issue, perform the following operations in order.

Shut down the server
Perform a forced reset
Reboot the server

Previously Published As
102200
Internal Comments

If the upgrade satisfies the conditions listed above, then shut down the single-path server first, and then, exchange the micro-program in the Alternate SCSI path mode.

Note: "Alternate SCSI path mode" method and procedures are documented in SE9990 and SE9985 Maintenance Manuals, Sections MICRO-FC04-10.

Related Information

URL: http://sejsc.ebay/AL/USP_041854R2.htm
http://pts-storage.west/products/T99x0/documentation.html
Other: HDS Alert USP_041854R2

Internal Contributor/submitter
James.Beck@Sun.COM

Internal Eng Business Unit Group
KE Authors

Internal Eng Responsible Engineer
jeffrey.hibser@sun.com

Internal Services Knowledge Engineer
sean.hassall@sun.com

Internal Kasp FAB Legacy ID
102200

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

Internal SA-FAB Eng Submission
Devices may become unavailable when attempting USP Non-Stop micro-program exchange when the subsystem is connected to (AIX/MSCS/Tru64/SUN (with HA software)) hosts issuing the reserve command.

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

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