Hi
It really depends on type of data. I have seen numerous files with
smaller in size occupy more space on tape so you might notice even
100Gig data occupy LTO2 ( 200gIG ) and volume will be full. If you
backing up huge single file then LTO2 could occupy 1TB. So it depends
purely on type of data.

Good luck
 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Avy Wong
Sent: Friday, May 30, 2008 10:49 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] LTO2 storage space

Zoltan,
      I guess there is really no way to put a define number to the
storage capacity. It will still be based on data being compressed or not
?

Avy Wong
Business Continuity Administrator
Mohegan Sun
1 Mohegan Sun Blvd
Uncasville, CT 06382
(860)862-8164
(cell) (860)961-6976




             Zoltan
             Forray/AC/VCU
             <zforray AT VCU DOT EDU>
To
             Sent by: "ADSM:           ADSM-L AT VM.MARIST DOT EDU
             Dist Stor
cc
             Manager"
             <[email protected]
Subject
             .EDU>                     Re: [ADSM-L] LTO2 storage space


             05/30/2008 10:34
             AM


             Please respond to
             "ADSM: Dist Stor
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                   .EDU>






The label info states the NATIVE and COMPRESSED capacity. The compressed
capacity assumes a 2:1 ratio.

However, as with all compression/compaction, YMMV.  For instance, I have
some LTO2 tapes that TSM says contain >700GB of data since the data was
highly compressable.



Avy Wong <AWong AT MOHEGANSUN DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
05/30/2008 10:30 AM
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"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


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Subject
[ADSM-L] LTO2 storage space






Hello,
      Can you tell me how much storage is actually going into one of
these Maxell, Ultrium LTO2 (200/400GB)? why does it not simply say 200
GB or 400 GB? Does it mean if it is compacted or not? Thank you for
clarify this for me.


Avy Wong
Business Continuity Administrator
Mohegan Sun
1 Mohegan Sun Blvd
Uncasville, CT 06382
(860)862-8164
(cell) (860)961-6976