ADSM-L

Re: DLT IV Tape Capacity

1998-10-30 10:33:21
Subject: Re: DLT IV Tape Capacity
From: Paul Zarnowski <vkm AT CORNELLC.CIT.CORNELL DOT EDU>
Date: Fri, 30 Oct 1998 10:33:21 -0500
Careful.  You're mixing apples and oranges.  No doubt, the Legato number
reflects pre-compressed data, and ADSM post-compressed.  Even so, I
wouldn't expect numbers as high as 200GB.  That would indicate almost
6-to-1 compression.

We are seeing on average about 32.5-33.5GB per tape (CompactTapeIV on
DLT7000).  We use client compression but not tape drive compression.

..Paul
--
At 08:33 AM 10/30/98 -0500, you wrote:
At 08:33 AM 10/30/98 -0500, you wrote:
>I'm looking for confirmation on Tape Capacities.
>
>We will be deploying a Sun E450 Server writing to DLT7000s in a
>StorageTek TimberWolf 9714 Tape Library.
>
>From the thread started by Yu Chen regarding tapes being marked Full, I
>see that some of you see tape capacities of 35GB of data.  Is this the
>average for DLT IV in DLT7000 tape drives?
>
>I'm familiar with a site using Legato Networker writing to DLT7000s.
>They are seeing tape capacities near 200GB.
>
>TIA,
>--
>Mark Dyer
>Systems Administrator               e-mail: mark.dyer AT fle.gmpt.gmeds DOT com
>Service Delivery - UNIX Team         voice: (810) 236-0373 [8-446]
>                                       fax: (810) 236-9290 [8-446]
>
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>                     Mail Stop 485-184-110
>                     902 E. Hamilton Ave
>                     Flint, MI  48550
>
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