[Veritas-bu] Why don't tapes hold the same amount of data?

Subject:	[Veritas-bu] Why don't tapes hold the same amount of data?
From:	wts AT maine DOT edu (Wayne T Smith)
Date:	Tue, 28 Feb 2006 13:10:10 -0500

The difference you see is probably due to varying compressibility of 
data.  It's also possible that failed or expired backup images take up 
space that couldn't be reused.

cheers, wayne

Geoff Hazel wrote, in part,  on 2/28/2006 12:36 PM:
> We have all the same tapes in the robot library, but when I look at 
> the "full" tapes I see a wide difference in the amount of data they have:
>  
> A00085  HCART    TLD      0       16     -       3     151715893       
> FULL
> A00088  HCART    TLD      0       7      -       1     255478199       
> FULL
> A00089  HCART    TLD      0       10     -       1     343680501       
> FULL
> A00090  HCART    TLD      0       13     -       3     315433835       
> FULL
> Why do some tapes hold twice as much data as other tapes?
>

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