Networker

Re: [Networker] SCSI Bus resets in SAN fabric environment

2004-10-07 10:35:18
Subject: Re: [Networker] SCSI Bus resets in SAN fabric environment
From: Chad Smykay <csmykay AT RACKSPACE DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Thu, 7 Oct 2004 09:31:50 -0500
Mark,

Are all of your Servers in the same Datazone?  (i.e. one of them is the NW
server and the others are SN's)

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] 
On
Behalf Of Mark Dokter
Sent: Thursday, October 07, 2004 6:53 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] SCSI Bus resets in SAN fabric environment

On Wed, 6 Oct 2004 13:17:12 -0400, Claudio Jaime <cjaime AT FALABELLA DOT CL>
wrote:

>Hi, I have the same problem
>
>My configuration:
>
>Server Legato: AIX 5.1
>Legato  7.1 Build 230
>
>SAN Components:
>
>Router Crossroads 10000
>Switch SilkWorm 3200
>Library L700 with seven SDLT3200
>
>The seven units share by four nodes (3 AIX and 1 Tru64)
>
>
>Best regards
>
>Claudio E. Jaime
>Depto. Ing. de Sistemas
>Fono: 56-2-3802938
>mailto: cjaime AT falabella DOT cl
>
>
>-----Mensaje original-----
>De: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]En
>nombre de Shaun Ellis
>Enviado el: Martes, 31 de Agosto de 2004 16:16
>Para: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>Asunto: Re: [Networker] SCSI Bus resets in SAN fabric environment
>
>
>The NSR from HP can block SCSI bus resets.
>
>S Ellis
>OpenVMS Product Manager & Advisory Technical Marketing Engineer
>LEGATO Software
>3210, Porter Drive
>Palo Alto
>Ca 94304
>USA
>Phone: +1 (650) 842 9548
>Mobile: +1 (408) 431 6997
>MMS:   4084316997 AT mobile.att DOT net
>
>> -----Original Message-----
>> From: owner-networker AT LISTMAIL.TEMPLE DOT EDU [mailto:owner-
>> networker AT LISTMAIL.TEMPLE DOT EDU] On Behalf Of Alain Richard
>> Sent: Tuesday, August 31, 2004 1:12 PM
>> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
>> Subject: SCSI Bus resets in SAN fabric environment
>>
>> Bus resets in SAN fabric environment
>>
>> Hi
>>
>> We have problem with scsi bus reset. In our case, some time, our
>> Compaq tru64 cluster and our Windows cluster send SCSI BUS RESET.
>> (see extract below)
>>
>> /var/adm/messages.1:Jul  4 03:55:46 rosalie root: [ID 702911
>daemon.notice]
>> NetWorker media: (info) EEI bus/device reset detected on
>/dev/ntape/tape2_d1
>> /var/adm/messages.1:Jul  4 03:55:50 rosalie root: [ID 702911
>daemon.notice]
>> NetWorker media: (info) EEI bus/device reset detected
>> on /dev/ntape/tape2_d1 at opening. Rewinding tape
>>
>> Question:
>> =========
>> - we use a FC to SCSI router to connect our librairy. Is there a router
on
>> the market who can filter "SCSI BUS RESET" to prevent the tape drive from
>> rewinding by mistake?
>>
>> Our kit is:
>> ===========
>> Compaq SAN (3 switch,1 SCSI router 2FC->4LVD)
>> SUN e250 as Legato server DDS (SAN attach),(2 Compaq "jni" HBA)
>> Compaq tru64 cluster as SAN storage node and DDS, (2 Compaq "emulex" HBA)
>> Widows 2000 as SAN storage node and DDS, (2 Compaq "emulex" HBA)
>> Widows 2000 cluster as SAN storage node and DDS, (2 Compaq "emulex" HBA)
>> Widows 2000 cluster as SAN storage node and DDS, (2 Compaq "QLOGIC" HBA)
>> 2 library STK L80 with 4 SDLT drives "LVD"
>>
>> Alain R.
>>
>> --
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>--
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>--
>Note: To sign off this list, send a "signoff networker" command via email
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We have the same problem in the same configuration.
It''s caused by the lus driver triggering a bug in the qlc driver when there
are slow device (robot arm). The result is a total reset of the bridge.

There is an IDR patch which will soon be a regular patch. It works fine now,
no scsi resets anymore.

The IDR is IDR118291-01

Ask SUN.

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Note: To sign off this list, send a "signoff networker" command via email
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also view and post messages to the list. Questions regarding this list
should be sent to stan AT temple DOT edu
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--
Note: To sign off this list, send a "signoff networker" command via email
to listserv AT listmail.temple DOT edu or visit the list's Web site at
http://listmail.temple.edu/archives/networker.html where you can
also view and post messages to the list. Questions regarding this list
should be sent to stan AT temple DOT edu
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