Date: Tue, 3 Dec 1996 12:30:28 -0800 (PST) From: Doug White <dwhite@gdi.uoregon.edu> To: Jeff Aitken <jaitken@dimension.net> Cc: "'questions@freebsd.org'" <questions@freebsd.org> Subject: Re: HP T4000s tape drive Message-ID: <Pine.BSI.3.94.961203122733.4320E-100000@gdi.uoregon.edu> In-Reply-To: <01BBDEE5.9AAD8240@floosie.aitken.com>
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On Sat, 30 Nov 1996, Jeff Aitken wrote: > I recently purchased an HP T4000s "Colorado" SCSI-2 tape drive for use on a > FreeBSD/NT box (FreeBSD-2.1.5-RELEASE, FWIW). This drive uses tapes which purport > to back up 4/8GB (without/with compression). I found the following info in the > hardware guide that came with the drive: We have the Connor QIC predecessor to this drive and it works great. > I'm a little unsure just how I should invoke, e.g., dump(1) to have things work > "optimally". If I specify no arguments at all, like this: > > dump 0uf /dev/nrst0 /home Nope. You need to specify the number of blocks and the blocksize. The d and s options are no longer useful. We use the following command line(s) in a script to remotely backup one of our machines to a Connor tape in another box: rdump 0uBbf 2000000 10 resnet2.uoregon.edu:/dev/nrst0 / rdump 0uBbf 2000000 10 resnet2.uoregon.edu:/dev/nrst0 /var rdump 0uBbf 2000000 10 resnet2.uoregon.edu:/dev/nrst0 /usr rdump 0uBbf 2000000 10 resnet2.uoregon.edu:/dev/rst0 /usr1 Adjust the numbers as necessary to fill the tape. > After searching both the www.freebsd.org databases (WWW/Handbook and > USENET archive) I could turn up only two references to this matter, > neither of which was terribly specific. One person mentioned that they > had a similar drive (Conner T4000) and that it worked well (it "ripped > right along" was the comment). I figure I must be missing something, > since my drive hardly "rips right along". I'm seeing between 100 and > 300 KBps during backups, far from the advertised 514KBps (which, no > doubt, only occurs under "optimal" circumstances, like when using the > HP-provided software under an HP-supported platform :-) :-) :) The blocksize is wrong for the drive. My commandlines above allow the tape to stream right along. Doug White | University of Oregon Internet: dwhite@resnet.uoregon.edu | Residence Networking Assistant http://gladstone.uoregon.edu/~dwhite | Computer Science Major
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