Thanks Christian, and everyone, for the suggestions. Even if I can convince TSM to work with the tapes spread across the 4 libraries, I think I still lose too much throughput.
If I want to restore multiple clients/filespaces in parallel, I think we could easily get into the situation that client 1 is using the drive in library 1, and the restore for client 2 needs a tape that is also in library 1. The only way I can see to keep all 4 drives busy is to use them in manual mode. (Short of doing MOVE NODEDATA to guarantee that every client is on its own tape, which is highly unrealistic for a copy pool. Not that this scenario is realistic to begin with!) Thanks everyone! Wanda (maybe another margarita will bring more enlightenment......) On Fri, Jul 10, 2009 at 5:58 AM, Christian Svensson < christian.svens...@cristie.se> wrote: > Hi Wanda, > On my way to work this morning I have been thinking about your situation > and I think I have an idea how you can get it to work. But only for restore > not for backup... :) > I haven't try this yet and probably don't have time to test it for you. But > I think this will work. > > Define 4 SCSI Libraries > Define 4 Drives. 1 to each Library > Create 3 NEW Copypool Device Class that is pointing to Library 2,3 and 4 > (CopyClass2, CopyClass3, CopyClass4) > And Update one Device Class to point to the 1st Library. > Now do a Audit of the library with Owner=YOUR TSM SERVER > > In this stage does TSM know that ALL Tape are available but in different > libraries. > > Technically it should work. The database knows what tape TSM need and only > change the data entry-path for the tape in the same way it does with the > "primary" (1st) Library you have. > > This is still just an crazy idea like always that I normally have. > > > Best Regards > Christian Svensson > > Cell: +46-70-325 1577 > E-mail: christian.svens...@cristie.se > Skype: cristie.christian.svensson > ________________________________________ > Från: ADSM: Dist Stor Manager [ads...@vm.marist.edu] för Wanda > Prather [wprat...@jasi.com] > Skickat: den 10 juli 2009 03:33 > Till: ADSM-L@VM.MARIST.EDU > Ämne: Desperation, DR, and four TS3100 libraries... > > I'm drawing a blank here, any suggestions welcomed. > > I have a TSM customer who makes their copypool tapes using a TS3200 with > LTO4 drives. > The TS3200 is a rack-mounted, 2 drive, 40-mumble slot standard ASCII > library. No issues. > One copy pool, tapes vaulted and sent offsite. > > They want to go to a commercial DR vendor site and do a DR test next week. > The commercial DR vendor, unbelievably, has no multi-drive LTO4-capable > libraries. > > Instead, they want us to use 4 (count 'em, four) TS3100 libraries. > The TS3100 is a rack-mounted, 1 drive, 20-mumble slot standard ASCII > library. > > There's only 1 copy pool, so all tapes were created on the same device > class. > Ignoring the which-carts-would-go-in-which-library issue, I can't have a > device class pointing to 4 libraries. > > And, the TS3100 is built in such a way that unlike a TS3500, you can't open > the doors and access the drives for manual mounting. > (I'd be happy to pull the covers off and try it, ignoring any warranties I > might void, but I doubt the vendor will let me attack the thing with a > screwdriver/wrench/hacksaw.) > > If I put all the carts in one TS3100 that will work, but that leaves me > only > 1 drive to restore all the clients, and they won't likely get done in the > desired time window. > > The only thing I can think of to use all 4 drives, is to define those four > TS3100's as 1 manual library with 4 manual drives, and use the front panel > of each TS3100 to move tapes from the I/O slot to the drive when TSM > requests a mount. > > (Actually the FIRST thing I thought of, was "cancel the DR contract, this > is > nonsense". But my customer isn't convinced yet...) > > Anybody got a better solution? > I've already tried a margarita, it didn't help.... > > W >