We just had a DRP test and this question came up and I'd like confirmation that I'm reading your remark correct. TSM, on a restore, will mount a tape once and take all the files off of once?
thx To ADSM-L@VM.MARIST.EDU cc From Sent by "Kauffman, Tom" <[EMAIL PROTECTED]> on 08/18/2006 11:30 AM "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> Subject Re: [ADSM-L] server restore behavior Please respond to "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> TSM will mount and start as many sessions as possible, and the rest will be in 'wait media' state until the tape they need (or a tape drive) becomes available. Given your scenarion, you may have one session reading tape and the other four waiting for access to the same tape. When the first session has retrieved ALL the files it needs from the first tape, it will go to the second (if not in use) and the session that has been waiting the longest will now get access to that first tape. Tom Kauffman NIBCO, Inc -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Troy Frank Sent: Friday, August 18, 2006 12:23 PM To: ADSM-L@VM.MARIST.EDU Subject: server restore behavior This is more of a curiosity question than a problem. In a multiple-client restore scenario where you start up say 5 restores at once from different nodes (with 4 tape drives, and resourceutilization set to 4 on nodes), how does the server process the request? Technically, data from all 5 nodes are probably on a lot of the same tapes. Does it.... A) mount each tape exactly once, getting all data for all running restores off that tape before unmounting. B) Process the restores relatively serially for each node, giving each all 4 drives until completed. Unmounting/remounting the same tapes multiple times. C) Only give each node 1 tape drive to work with, which will effectively ellicit behavior very similiar to option B. Or does it do something different than any of these? Confidentiality Notice follows: The information in this message (and the documents attached to it, if any) is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken, or omitted to be taken in reliance on it is prohibited and may be unlawful. If you have received this message in error, please delete all electronic copies of this message (and the documents attached to it, if any), destroy any hard copies you may have created and notify me immediately by replying to this email. Thank you. CONFIDENTIALITY NOTICE: This email and any attachments are for the exclusive and confidential use of the intended recipient. If you are not the intended recipient, please do not read, distribute or take action in reliance upon this message. If you have received this in error, please notify us immediately by return email and promptly delete this message and its attachments from your computer system. We do not waive attorney-client or work product privilege by the transmission of this message. DISCLAIMER: This communication, along with any documents, files or attachments, is intended only for the use of the addressee and may contain legally privileged and confidential information. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of any information contained in or attached to this communication is strictly prohibited. If you have received this message in error, please notify the sender immediately and destroy the original communication and its attachments without reading, printing or saving in any manner. This communication does not form any contractual obligation on behalf of the sender or, the sender's employer, or the employer's parent company, affiliates or subsidiaries.