[SunHELP] Re: tape drive compression

[Dave Gargan]

OK, now with the correct subject.....



man st shows the information you want.  

0m is for medium compression, however on DAT tape devices it only
specifies that m, h, and c use data compression, not that each one has a
different associated tape density.  It may be the case that m, h, and c
all use high compression.

Dave


>Message: 6
>Date: Fri, 09 Aug 2002 10:29:43 -0400
>To: sunhelp at sunhelp.org
>From: Edward Chase <echase at postoffice.providence.edu>
>Subject: [SunHELP] tape drive compression
>
>Hello, I've got a E3500 here with an internal DDS-3 tape drive in it.
>
>I've been doing backups using, ufsdump 0f /dev/rmt/0cn <filesystem
>name>

>I believe that writes to tape using "normal" compression.  I do believe
>
>that I've heard somewhere along the line that there is an "extra" 
>compression mode.  Would this be /dev/rmt/0mn (max compression)?
>
>Right now I'm not worried about any extra time this may take, I don't
>wish 
>to get into incremental or multi tape backups if I don't have to.
>
>TIA.
>
>
>
>---------------------------------------------------------------
>  Edward F. Chase III     |   echase at providence.edu
>  Providence College      |   http://www.providence.edu
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