Date: Sat, 28 Jul 2001 09:48:14 -0700 From: Gunnar H Reichert-Weygold <patron1_nospam@paganlibrary.com> To: mark tinguely <tinguely@web.cs.ndsu.nodak.edu>, freebsd-questions@FreeBSD.ORG, own3d@gmx.net Subject: Re: Tape backup with software compression Message-ID: <01072809481402.00652@gunnar.weygold.edu> In-Reply-To: <200107271522.f6RFMYV29138@web.cs.ndsu.nodak.edu> References: <200107271522.f6RFMYV29138@web.cs.ndsu.nodak.edu>
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The stt38000n does not support compression. The stt38000n-c does. On Friday 27 July 2001 08:22, mark tinguely wrote: > > The problem is that i have a backup tape drive (Seagate STT38000N) > > with a capacity of 4GB uncompressed and 8GB compressed. But it does > > not seem to support hardware compression (at least i couldn't > > enable it with 'mt comp on'). > > have you checked the jumper settings for the tape drive? There usually > is a jumper that enables hardware compression. > > second, are you streaming the drive -- delivering the data to the > drive fast enough so that the tape is not stopping and starting. > > > Now im looking for a way to do some software compression on the data > > so that it fits one tape. That way it can be done by a nightly cron job. > > > > As far as i have read in the archives and in the manpage, dump (which > > seems be the best backup tool) does not offer any compression at all. > > Right? > > you can dump to standard output, pipe to gzip, and then dd to tape > to keep the fixed file records. Restore would be done in the opposite > order. > > hardware compress would be better than software compression, so I would > advise you pull out the drive and look at the jumpers located on the > back of the drive. > > --mark tinguely. > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Dare to be stupid. Above address is an autoresponder! Correct email address: patron1 at paganlibrary dot com Gunnar H Reichert-Weygold http://www.paganlibrary.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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