Re: [Veritas-bu] SSO between HP-UX and Windows

SCSI reserve only applies on the host in question. NetBackup has a fancy scheme constructed for SSO that checks other known media servers' SCSI reserves, but the protocol itself doesn't allow for shared access.

That means that any host that's not configured properly as a media server but does see the drives and any process on any host that is configured properly but isn't NetBackup can screw with drives other hosts are using.

--
gabriel rosenkoetter
Radian Group Inc, Unix/Linux/VMware Sysadmin / Backup & Recovery
gabriel.rosenkoetter AT radian DOT biz, 215 231 1556

From: Forester, Jack L [mailto:jack.l.forester AT lmco DOT com]
Sent: Wednesday, September 24, 2008 12:11 PM
To: Rosenkoetter, Gabriel; BeDour, Wayne
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] SSO between HP-UX and Windows

If the drive is SCSI reserved by another host, how can EMS probing a drive cause it to rewind? Now maybe if EMS on the server that’s using the device probes the device on the server as it’s using it, that could cause problems.

Jack L. Forester, Jr.
UNIX Systems Administrator, Stf
Lockheed Martin Information Technology
(304) 625-3946

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Rosenkoetter, Gabriel
Sent: Wednesday, September 24, 2008 11:48 AM
To: BeDour, Wayne
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] SSO between HP-UX and Windows

Unless I'm mistaken, you do still need to deactivate EMS monitoring of stape devices on HP-UX, because it'll probe devices that are SCSI-reserved by other hosts through a rewind device, causing the tape to rewind under an active backup.

(But maybe that's less broken under 11iv3? I'm not sure, I haven't tried recently.)

--
gabriel rosenkoetter
Radian Group Inc, Unix/Linux/VMware Sysadmin / Backup & Recovery
gabriel.rosenkoetter AT radian DOT biz, 215 231 1556

From: Martin Ruslan [mailto:mit.martin AT gmail DOT com]
Sent: Tuesday, September 23, 2008 10:49 PM
To: BeDour, Wayne
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] SSO between HP-UX and Windows

No problem at all..
just using the wizard, it's the recommended way according to the manual guide.

Regards,
mTz

On Tue, Sep 16, 2008 at 1:46 AM, BeDour, Wayne <WBedour AT lear DOT com> wrote:

Our environment, HP-UX 11-31 with a SureStore 20/700 tape library, one master / media server running NetBackup 6.5.2 backing up mainly HP servers with a few Sun and Windows boxes thrown in. We would like to configure one Windows SAN media server, use SSO to share two tape drives with our HP Master on the 20/700. We are not currently using SSO and my only exposure so far is the manual. Anyone like to share suggestions or what to look out for in setting this up?

Thanks in advance….

Wayne BeDour

Unix System Administrator

PH: 313-593-9876

Internet: wbedour AT lear DOT com

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