Alper

I've been giving a bit of thought to this myself recently, although it's
more of an academic exercise since we're not in the market for a new
library at the moment.

Some things you may want to consider:

Do you (now or in the future) have a requirement for LAN-free backup? I
would expect this to be significantly harder with a FILE device class
compared to a physical/virtual tape library solution.

Are you considering switching to a capacity-based TSM license model? If so
then I've been told that it's the volume of primary storage after TSM
de-dupe but before hardware-level de-dupe/compression that counts, which
may incline you more towards the disk-based solution.

Either way I'd be interested to hear what you decide.

Regards
Neil Schofield
Technical Leader
Data Centre Services Engineering Team
Yorkshire Water Services Ltd.

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