Hello Dana, normally I create storage pools on RAID-5 protected disk arrays using 5 disks per RAID group for high performance on writing and short rebuild times in case of hardware failures. Using larger RAID groups with 6, 7 or more data drives were found to be very slow during RAID rebuild, sometimes dataloss is caused because of a second disk failure, especially on SATA drives. The only good for running RAID 1 is short rebiuld time; it does not provide any additional performance, security, or avaibitlity.
Regards Ullrich Maenz Von: Dana Holland <[email protected]> An: [email protected] Datum: 09.08.2010 17:25 Betreff: [ADSM-L] Raid 1 vs Raid 5 Gesendet von: "ADSM: Dist Stor Manager" <[email protected]> Does anyone have opinions about setting up storage pools as Raid 1 as opposed to Raid 5? We have a very limited amount of disk space at the moment and don't know when we'll get approval to buy more. At the time we first started planning to implement TSM, we purchased what we thought would be plenty of storage. But, that was 4 years ago - and our usage has grown. Now, if I choose Raid 1, I barely have enough to create a primary and copy storage pool for one of our servers. And that isn't allowing for any growth at all. And I'm not sure how much additional space incremental backups would take. I know Raid 5 would give me more storage space, but I've also read that it's harder to recover from if there's a disk failure (read this on a TSM site somewhere). So, I'm wondering what some of you are using? __________ Information from ESET NOD32 Antivirus, version of virus signature database 5352 (20100809) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
