HSM and backup-restore are very different concepts with equally different 
handling and, usually, architecture.  While backup/restore is essentially 
serialized, HSM is on demand parallelized via independent processes.  Define 
your objectives and then seek a storage architecture to fit the needs.

     Richard Sims

On Mar 25, 2011, at 4:26 PM, andresms5 wrote:

> I'm looking into methods for HSM for my company.
> 
> One of the requirements I have is that restores must use the maximum speed we 
> can achieve.
> 
> I have looked at several TSM pages, but couldn't find something that 
> explicitly explains how parallel restores (the NQR option) are going to be 
> performed.
> 
> My specific question is: Do all copies have to go over the server or can they 
> go over different paths?
> 
> For example:
> 2 files (F1,F2) are to be restored to two different primary systems (P1,P2) 
> from 2 different secondary storage systems (S1,S2). Does TSM support a 
> physical connection like the one shown bellow in a) or does it have to be a 
> connection such as the one shown in b)
> a)
> P1 <----- F1 ------ S1
> P2 <----- F2 ------ S2
> 
> b)
> P1 <--F1---\                            /---F1---- S1
>                    ----- Server ------
> P2 <--F2---/                            \---F2---- S2
> 
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