SCSI reserve should be effective regardless of how NetBackup is configured. My understanding is that if an initiator has issued a SCSI reserve command to a drive, no other initiator can mess with the drive until a SCSI release is issued or the drive is reset. We had this issue with drives rewinding way back in the 3.4 days, and enabling SCSI reserve cured the problem.
As long as NetBackup on the media server running the backup issues the SCSI reserve, no other server should be able to cause a rewind. Jack L. Forester, Jr. UNIX Systems Administrator, Stf Lockheed Martin Information Technology (304) 625-3946 ________________________________ From: Rosenkoetter, Gabriel [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 24, 2008 12:13 PM To: Forester, Jack L; BeDour, Wayne Cc: veritas-bu@mailman.eng.auburn.edu Subject: 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 [EMAIL PROTECTED], 215 231 1556 ________________________________ From: Forester, Jack L [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 24, 2008 12:11 PM To: Rosenkoetter, Gabriel; BeDour, Wayne Cc: veritas-bu@mailman.eng.auburn.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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rosenkoetter, Gabriel Sent: Wednesday, September 24, 2008 11:48 AM To: BeDour, Wayne Cc: veritas-bu@mailman.eng.auburn.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 [EMAIL PROTECTED], 215 231 1556 ________________________________ From: Martin Ruslan [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 23, 2008 10:49 PM To: BeDour, Wayne Cc: veritas-bu@mailman.eng.auburn.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 <[EMAIL PROTECTED]> 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: [EMAIL PROTECTED] ********************** ** LEGAL DISCLAIMER ** ********************** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer. _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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