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From: mbl900@anusf.anu.edu.au (Mathew BM LIM)
Newsgroups: comp.periphs.scsi
Subject: Re: High Capacity Tapes: Exabyte or DAT?
Message-ID: <1991May28.130950@anusf.anu.edu.au>
Date: 28 May 91 03:09:50 GMT
References: <29543@hydra.gatech.EDU> <9850023@hpcpbla.HP.COM>
Sender: news@newshost.anu.edu.au
Reply-To: mbl900@anusf.anu.edu.au (Mathew BM LIM)
Organization: Australian National University Supercomputer Facility
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I am new to this discussion so I may have missed the answer to the following
question.

One of our vendors has told me that the 5GByte figure on the capacity on the
newer Exabyte drives is achived by on board data compression and that the actual
capacity depends on the compressability of your data. So presumably the
actual capacity of a tape is anywhere from 2.3GBytes to 5GBytes. Is this
true? If it is, does anyone have any figures on what the "typical" capacity
is when backing up a "typical" filesystem?

Thanks

-- 
Mathew Lim, Unix Systems Programmer, ANU Supercomputer Facility,	
Australian National University,	GPO Box 4, Canberra City, ACT, Australia 2601.
Telephone : +61 6 249 2750 	| ACSnet    : Mathew.BM.Lim@anu.oz
Fax       : +61 6 247 3425	| Internet  : Mathew.BM.Lim@anu.edu.au