On Sun, 2011-10-30 at 09:35 +0330, Mehdi Salehi wrote: > Thanks Remco, > VTL needs disk space to provide virtual cartridges and my concern is the > availability of this disk space. You are right! Backup data availability > could be addressed in higher levels like TSM copypools, but I am looking > for inherent disk availability features in IBM VTLs' architecture. For > instance, if an XIV box is connected to TS7680, what happens if the XIV > explodes? > > Thank you, > Mehdi
The ProtecTIER allows for replication at the VTL level - i.e. you can have two independent disk systems behind two VTLs and replicate the virtual carts over IP to a remote datacenter. And of course you can have a copy pool in a vault somewhere nice and safe. Whether I would consider the replicated cartridge in a primary storage pool to be enough off site protection to not have a copy pool is a different matter. I'm making the assumption that you want to have two disk systems in different datacenters and replicate between them rather than have two disk systems in the same datacenter and one VTL controlling both?
