Date: 14 Nov 1999 14:45:52 +0100 From: naddy@mips.rhein-neckar.de (Christian Weisgerber) To: freebsd-questions@freebsd.org Subject: Re: dump -a Message-ID: <80meeg$s8k$1@bigeye.rhein-neckar.de> References: <13D5F9EDFD72D211BC3100105A1C22330549E5@akira.lanfear.com>
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Marc Wandschneider <MarcW@Lanfear.com> wrote: > how good is the -a switch on the dump command? Very good. It's pretty much required for painless backups if you want to put several archives on a single tape or have a drive with compression. > I've got a 12/24GB Sony 4mm SCSI DAT drive, and was wondering if > I had to enter all the density/length commands, That's pretty futile. If you end up having to specify the capacity of the tape, do yourself a favor and use blocks ("-B") rather than the arcane density/length options. > or if the dump command would figure it out on it's own. That's actually not a question of dump figuring it out but rather of the tape driver properly returning a short write. sa(4) apparently does for my Wangtek 51000HT (QIC-1000). > Under Linux, we had no such luck, Until rather recently, the Linux port of dump didn't support "-a" at all. Version 0.4b9 certainly does. I don't know whether the Linux tape driver is up to it, but using rmt on a remote host, "-a" works. -- Christian "naddy" Weisgerber naddy@mips.rhein-neckar.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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