In an earlier thread, I polled this group on whether people recommend going 
with an array-based dedup solution or doing a TSM dedup solution.  Well, the 
answers came back mixed, obviously with an 'It depends'-type clause.

So, moving on…  assuming that I'm using TSM dedup, what sort of target arrays 
are people putting behind their TSM servers.   Assume here, also, that you'll 
be having multiple TSM servers,  another backup product, *coughveeam and 
potentially having to do backup stgpools on the dedup stgpools.  I ask because 
I've been barking up the mid-tier storage array market as our potential disk 
based backup target simply because of the combination of cost, performance, and 
scalability.  I'd prefer something that is dense I.e. more capacity less 
footprint and can scale up to 400TB.  It seems like vendors get disappointed 
when you're asking for a 400TB array with just SATA disk simply for backup 
targets.  None of that fancy array intelligence like auto-tiering, large 
caches, replication, dedup, etc.. is required.

Is there another storage market I should be looking at, I.e. really dumb raid 
arrays, direct attached, NAS, etc…

Any feedback is appreciated, even the 'it depends'-type.

Thanks!
Sergio