Dan
Well we use LTO3 400/800GB compressed - I see around 5-600 however alot
depends on:
 
Data crammed onto tape
Types of Data (if it can be compressed anymore)
 
I dont expect to get 800GB compression, but storing 400GB on a single tape
is good enough for me, especially considering what LTO1 started off with.
 
Also, depending on how your environment is configured also depends on the
tape usage (ie: multiple volumes means more tapes will be used for the
backup jobs, policies, frequency of backups, retenion periods perhaps).
 
How much data are you expecting to hold on a single Tape Dan?
 

Regards

Simon Weaver
3rd Line Technical Support
Windows Domain Administrator 

EADS Astrium Limited, B23AA IM (DCS)
Anchorage Road, Portsmouth, PO3 5PU

Email:  <mailto:Simon.Weaver at Astrium-eads.net> Simon.Weaver at 
Astrium-eads.net

-----Original Message-----
From: Sixbury, Dan [mailto:dsixbury at hrblock.com] 
Sent: 31 October 2006 19:07
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Determine efficiency of tape usage.



How do you determine the efficiency of your tape usage?  i.e. I was just
asked recently about our use of LTO3 tapes since they can hold up to 800 GB
compressed, how much we were actually consuming.  i.e. if we are getting our
money's worth for the larger capacity more expensive tapes.

Thanks 
Dan 



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