hi daniel, currently we're using ADSM 3.1 and IBM 3494 TL, we're planning to upgrade or change the backup & tape library solution, so, we're still evaluating the solution. we selected 3 backup solutions from the list (TSM, LEGATO, VERITAS)with there own proposed tape library. Since, we have that disk spaces available (3.7TB) with 80% utilised, we want to calculate the required TL capacity. If we selected TSM what is the required capacity for TL if we implemented 4 versions of archive & 3 versions of incremental backups.
reagrds, -----Original Message----- From: Daniel Sparrman [mailto:[EMAIL PROTECTED]] Sent: Monday, March 11, 2002 5:55 PM To: [EMAIL PROTECTED] Subject: Re: Tape Library Capacity Requirement. Hi It sounds like you're going to use a "full backup" software such as Legato. However, I will do my estimates based on TSM, which uses incremental backups, and version management to be able to do point-in-time restores of files(older version of a file than the latest) and applications. I'd probably propose a IBM 3584 Anaconda with at least 3 drives, preferable fibre attached. I guess that you are going to use TSM with this library. Therefore, you will probably not use full backups, but incremental. And, on fileservers, I recommend using more than 3 versions(which is standard within TSM). This will grow your total storage by the number of versions you want to use. It' very hard to calculate total storage requirements, when you don't tell us what kind of data that is going to be kept in the library(SQL databases, fileservers and so on). However, you can count with about 10% change every night on a fileserver, and, if not to large, use full backups of databases. I'd say you'll be storing about 10TB total, and preferable, have media protection using copypools, which means another 10TB. Best Regards Daniel Sparrman ----------------------------------- Daniel Sparrman Exist i Stockholm AB Bergkällavägen 31D 192 79 SOLLENTUNA Växel: 08 - 754 98 00 Mobil: 070 - 399 27 51 Zosimo Noriega <[EMAIL PROTECTED] To: [EMAIL PROTECTED] OM> cc: Sent by: "ADSM: Subject: Tape Library Capacity Requirement. Dist Stor Manager" <[EMAIL PROTECTED] .EDU> 2002-03-11 10:52 Please respond to "ADSM: Dist Stor Manager" Please help me to calculate the require capacity of the tape library. I have 3.7 TB of data and 4 versions of Archive (with 30 days retention period) and 1 version of backup (full backup) will be implemented. How can i calculate the required capacity? Thanks for your help in advance. Zosi Noriega ADNOC-UAE.
