Yes there is a way to do write to two tapes simultaneously: one primary and one copy. Use the copystg parameter on the primary pool to set this. This action behaves with respect to the collocation parameter on each pool. So if the primary pool is collocated and the copy is not, the correct thing will happen.
Also, remember we don't mirror tapes anyway and that term is not appropriate. What we do is make sure that there are two copies of the data: one copy in the primary pool and one in the copy pool. These copies are created either by writing to the to pools at the time of the client backup (which is not always practical) or by using the backup stgpool command. In general, plan on writing to two tapes at the same time if the data from the client is large. If it is not, consider sending data to a disk based pool first, backing that up to the copy pool and then migrating to the tape pool. Kelly J. Lipp VP Manufacturing & CTO STORServer, Inc. 485-B Elkton Drive Colorado Springs, CO 80907 719-266-8777 [EMAIL PROTECTED] -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Skylar Thompson Sent: Thursday, October 19, 2006 9:07 AM To: [email protected] Subject: [ADSM-L] Tivoli storage manager migration/backup I'm setting up TSM to replace an existing backup setup. The existing setup uses software based tape mirroring, and we'd like to continue doing something similar. I would rather avoid real tape mirroring, so I can do collocation on the on-site pool, and no collocation on the off-site pool. Basically, I'd like to ensure that data the enters our disk cache gets backed up to our copy pool at least once before it gets migrated to our primary on-site tape pool. Is there anyway to do this? I'm running TSM on a Red Hat Enterprise 4 server. I have a 5TB (soon to be 10TB) disk cache, and back up anywhere from 500GB to several terabytes daily, depending on how much churn the labs in my department create. -- -- Skylar Thompson ([EMAIL PROTECTED]) -- Genome Sciences Department, System Administrator -- K324, (206)-685-7354 -- University of Washington Medical Center
