"ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 02/06/2006 01:07:08 PM: > I know we've been over this, but times change, and technology changes. > Conventional Wisdom on this list has been that the best disk layout for > your TSM Database is: > > JBOD disks, Raw volumes, mirrored by TSM, with 2 dbvols per physical > volume.
In every instance where TSM mirroring has saved my butt, it was from the mirroring of the log. In a hard server crash, it is the log that will most likely be corrupted, and having that 2nd copy has saved me at least a dozen times. I feel perfectly comfortable keeping a single copy of the DB out on RAID protected disk, but I still prefer to use TSM log mirroring whenever possible. Even if I only have a single SAN device/LUN available, I still try to stick 2 log copies on it.