[Veritas-bu] How can 160-180 GBytes fit onto a 80 GByte DLT tape

Subject:	[Veritas-bu] How can 160-180 GBytes fit onto a 80 GByte DLT tape
From:	justin AT brighton.ac DOT uk (justin AT brighton.ac DOT uk)
Date:	Fri, 5 Apr 2002 14:13:39 +0100

Thanks for all your replies concerning duplicating images spanning over a
couple of tapes (Subject: Duplicated faulty tape).

Something else is confusing me!  NetBackup reports we're fitting around
160-180 GBytes on each DLT tape!  Surely not?  The quoted capacity of a
DLT IV in a DLT 8000 drive is 80 GBytes (assuming a 2:1 compression
ratio).  Does anyone have a logical explanation or is the compression
really that good? :)

 ID     type    type      #     slot    face    level  KBytes
-------------------------------------------------------------------------
---
BK0014  DLT      NONE     -       -      -       5     192122560       
FULL

Many thanks, Justin
-- 
\ Justin
/ Network Services, University of Brighton

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