At 9:27 AM -0400 10/22/02, Lawrence Clark said:
Even though there may be a slight performance hit on writes, I've placed the TSM DB on RAID-5 to ensure availability and no down time in case of a disk loss.
With RAID 5, is there any point in software mirroring (dual copies of database)?
Our DB is on RAID5 (Shark). We also have 2 copies of it, except for one extent that we added in a crunch when it filled up. Are the dual copies overkill on RAID 5? I know that even RAID is not totally infallible, and we could have a potential disaster that wipes out the whole Shark. But that's why we have backups. The chances of that are pretty slim, and I can't imagine any scenario where we could have a RAID failure that wouldn't leave us so dead that we'd have to restore anyway. -- Matt Simpson -- OS/390 Support 219 McVey Hall -- (859) 257-2900 x300 University Of Kentucky, Lexington, KY 40506 <mailto:msimpson@;uky.edu> mainframe -- An obsolete device still used by thousands of obsolete companies serving billions of obsolete customers and making huge obsolete profits for their obsolete shareholders. And this year's run twice as fast as last year's.
