Simon, I understand what checkpoints are used for, what I'm trying to understand is what exactly the "pitstop" you are talking about , is it another file number on the tape?, or even a marker at the beginning of a new file. I tend to sway to Martin's explanation where as it looks at the last successful fragment and begins after that, my only question is "can the fragments be overwritten as the backup has not completed and therefore the final image not validated . what if other backups using the same pool require tapes , how are these fragments protected until us mortals get in say 9 hours later and then restart the job ??. If the fragments are protected then potentially you could have useless data out there on tape as images don't complete. Could possibly the backup_id be created on checkpoint completion and the fragments added to the same backup_id, don't know whether its possible, but these are the questions I am trying to get answered. Any ideas ? Dave
________________________________ From: WEAVER, Simon [mailto:[EMAIL PROTECTED] Sent: 11 December 2006 15:12 To: Clooney, David; [email protected] Subject: RE: [Veritas-bu] Checkpoint on backups. Dave Essentially, they are like "pit stops" - takes a pointer behind the scenes of NBU. For those unsure of what it does (even though most do!), If checkpoint is enabled and it hits the "pitstop" at 450GB, a marker is set. If the backup fails at 475GB, the restart happens at 450GB, rather than ALL THE way back to the beginning of the backup job! Thats what I understand about them, and I do use them for large TB backups. Regards Simon Weaver 3rd Line Technical Support Windows Domain Administrator EADS Astrium Limited, B23AA IM (DCS) Anchorage Road, Portsmouth, PO3 5PU Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> -----Original Message----- From: Clooney, David [mailto:[EMAIL PROTECTED] Sent: 11 December 2006 11:59 To: [email protected] Subject: [Veritas-bu] Checkpoint on backups. Hi, Can anyone give a brief explanation of exactly what goes on when checkpoint's are implemented on normal backup schedules. Understand what they do but need to know what is going on in the background. Cheers Dave ________________________________ Notice to recipient: The information in this internet e-mail and any attachments is confidential and may be privileged. It is intended solely for the addressee. If you are not the intended addressee please notify the sender immediately by telephone. 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. When addressed to external clients any opinions or advice contained in this internet e-mail are subject to the terms and conditions expressed in any applicable governing terms of business or client engagement letter issued by the pertinent Bank of America group entity. If this email originates from the U.K. please note that Bank of America, N.A., London Branch and Banc of America Securities Limited are authorised and regulated by the Financial Services Authority. ________________________________ This email (including any attachments) may contain confidential and/or privileged information or information otherwise protected from disclosure. If you are not the intended recipient, please notify the sender immediately, do not copy this message or any attachments and do not use it for any purpose or disclose its content to any person, but delete this message and any attachments from your system. Astrium disclaims any and all liability if this email transmission was virus corrupted, altered or falsified. --------------------------------------------------------------------- Astrium Limited, Registered in England and Wales No. 2449259 Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England Notice to recipient: The information in this internet e-mail and any attachments is confidential and may be privileged. It is intended solely for the addressee. If you are not the intended addressee please notify the sender immediately by telephone. 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. When addressed to external clients any opinions or advice contained in this internet e-mail are subject to the terms and conditions expressed in any applicable governing terms of business or client engagement letter issued by the pertinent Bank of America group entity. If this email originates from the U.K. please note that Bank of America, N.A., London Branch and Banc of America Securities Limited are authorised and regulated by the Financial Services Authority.
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