Asset ID:	1-77-1001226.1
Update Date:	2011-03-04
Keywords:

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Solution Type  Sun Alert Sure

Solution  1001226.1 :   Sun StorEdge 3510 FC Array in Loop Mode May Cause Attached Hosts to Experience Excessive SCSI Timeouts Upon a Reboot  


PreviouslyPublishedAs
201647

Product
Sun StorageTek 3510 FC Array

Bug Id
<SUNBUG: 5038863>

Date of Resolved Release
25-MAY-2005

Impact

A specific loop configuration of a Sun StorEdge 3510 FC Array may cause attached hosts to experience excessive SCSI timeouts when a single host is rebooted. As a result, the hosts may experience performance degradation.

Contributing Factors

This issue can occur in the following release:

SPARC Platform

• Sun StorEdge 3510 FC Array without patch 113723-10

Note: This issue only occurs when the Sun StorEdge 3510 FC Array is configured in a loop mode in a SAN configuration.

Symptoms

Should the described issue occur, messages similar to the following are logged to the "/var/adm/messages" file of the other hosts when one of the hosts is rebooted:

    Apr 27 nsvr-88  /scsi_vhci/ssd@g600c0ff00000000000272a68ad13490a
(ssd75): Command Timeout on path /pci@1e,600000/SUNW,qlc@4,1/fp@0,0(fp3)

Workaround

To recover from the described issue, power cycle the array or fail, then unfail the controller on the array.

Note: "fail" and "unfail" are sccli(1M) commands which "disable" and then "enable" the controller.

To workaround the described issue, change from "loop mode" to "fabric point-to-point mode" on the Sun StorEdge 3510 FC Array by doing the following:

1. Telnet to the array

2. Select the following from the menu:

View and Edit Configuration Parameters ----> Host-side SCSI Parameters ----> Fiber Connection Option - Loop only

3. Change Fiber Connection Option - "Loop only" to "Point to Point only"

4. Reset and re-map the channels and luns on the array

Resolution

This issue is addressed in the following release:

SPARC Platform

• Sun StorEdge 3510 FC Array with patch 113723-10 or later

Modification History
Date: 25-MAY-2005

Change History

25-May-2005

• State: Resolved
• Updated Contributing Factors and Resolution sections

References

<SUNPATCH: 113723-10>

Previously Published As
101521
Internal Comments

Duplicate bugid 5044287

Internal Contributor/submitter
younan.sarkis@Sun.COM

Internal Eng Business Unit Group
NWS (Network Storage)

Internal Eng Responsible Engineer
Bagher.Vahdatinia@Sun.COM

Internal Services Knowledge Engineer
jeff.folla@sun.com

Internal Escalation ID
1-760691, 1-802551, 1-802882

Internal Resolution Patches
113723-10

Internal Sun Alert Kasp Legacy ID
101521, 57589 (Sun Alert)

Internal Sun Alert & FAB Admin Info
Critical Category: Availability ==> Pervasive
Significant Change Date: 2004-06-21
Avoidance: Patch, Workaround
Responsible Manager: bagher.vahdatinia@sun.com
Original Admin Info: [WF 04-Aug-2005, Jeff Folla: Made changes to internal section. Re-published so it does not show on "Rework Report".]

[WF 14-Jun-2005, Jeff Folla: Fixed solution field w/Karen. Will not re-issue because sunsolve is showing correctly.]

[WF 31-May-2005, Jeff Folla: I had two "Engineering Fix" listed. Removed one.]
This document has been imported from KMS Creator and may need adjustment before re-publishing.

This imported document has been reviewed/adjusted by:
Review Name:
Review Date:

Original KMS Creator attributes below:

--- PLEASE DO NOT MAKE ANY CHANGES BELOW THIS LINE! ---

Sun Alert ID: 57589
Synopsis: Sun StorEdge 3510 FC Array in Loop Mode May Cause Attached Hosts to Experience Excessive SCSI Timeouts Upon a Reboot
Category: Availability
Product: Sun StorEdge 3510 FC Array
BugIDs: 5038863
Avoidance: Workaround
State: Committed
Date Released: 21-Jun-2004
Date Closed:
Date Modified:
Escalation IDs: 1-760691, 1-802551, 1-802882
Pending Patches:
Resolution Patches:
FIN:
FCO:
Date Submitted: 16-Jun-2004
Submitter: younan.sarkis@Sun.COM
Responsible Engineer: Bagher.Vahdatinia@Sun.COM
Responsible Manager: bagher.vahdatinia@sun.com
CTE group: PTS NWS APAC
Responsible Writer: jeff.folla@sun.com
Distribution: Contract SunSolve

Workflow History:

WF State: Issued, 21-Jun-2004, Jeff Folla
WF Note: signoff approved by Younan. Sent for release.

WF State: Draft, 21-Jun-2004, Jeff Folla
WF Note: sent for signoff

WF State: Draft, 21-Jun-2004, Jeff Folla
WF Note: sent for review 6-18-2004

WF State: Draft, 17-Jun-2004, Jeff Folla
WF Note: Article created.

Exported from KMS Creator Sat May 21 09:11:15 2005 GMT, olaf.reineke@sun.com
Internal SA-FAB Eng Submission
Sun StorEdge 3510 FC Array in Loop Mode May Cause Attached Hosts to Experience Excessive SCSI Timeouts Upon a Reboot

Product_uuid
58553d0e-11f4-11d7-9b05-ad24fcfd42fa|Sun StorageTek 3510 FC Array

References

SUNPATCH:113723-10

Attachments

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