> Just in case I don't completely understand the pros/cons of FILE vs DISK, I 
> plan to use this > 5.3TB SAN disk space the same way I am using DISK on my 
> other servers - LZ            for  > incoming backups and then migrate to 
> disk.    Folks keep talking about reclamation of their > FILE devclass 
> storage.     I would never be doing that - just moving the backups to primary 
> > tape after making offsite copies          (which I hope to implement as a 
> duplex/simultaneous > operation with 6.2.x)

There is a VERY BIG difference between DISK and FILE. DISK device class has 
RANDOM access and reclamation is not required at all. FILE device class has 
SEQUENTIAL access. File system is used to keep virtual volumes very similar to 
tape volumes. Volume status is moving like this: EMPTY --> FILLING --> FULL. 
After expiry data usage of full volumes can be reduced from 100 up to 0 (up to 
one small file on volume) and this volume will be not available for writing 
(totally unused disk space!). Only reclamation can move volume from FULL to 
EMPTY and make it available for writing again;

Grigori G. Solonovitch

Senior Technical Architect

Information Technology  Ahli United Bank Kuwait http://www.ahliunited.com.kw

Phone: (+965) 2231-2274  Mobile: (+965) 99798073  E-Mail: Grigori.Solonovitch 
AT ahliunited DOT com

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