Date: Thu, 1 May 2003 17:23:54 -0500 From: "Jacques A. Vidrine" <nectar@FreeBSD.org> To: Dan Nelson <dnelson@allantgroup.com> Cc: freebsd-questions@FreeBSD.org Subject: Re: huge file, spanning multiple tapes Message-ID: <20030501222354.GA58218@madman.celabo.org> In-Reply-To: <20030501220317.GA58262@dan.emsphone.com> References: <20030501213842.GA58002@madman.celabo.org> <20030501220317.GA58262@dan.emsphone.com>
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On Thu, May 01, 2003 at 05:03:18PM -0500, Dan Nelson wrote: > How about tar? That lets you specify a change-volume script so you can > change tapes when you're writing, and when you read the tape later you > can specify the --to-stdout flag so it doesn't write to disk. Ah, I wasn't aware of the `--to-stdout' business. That may do the trick, though it is kind of hackish. It only works because I already have the file on disk, it seems. > If you can't have any headers, I don't want them, but in this case it doesn't screw me up. > you can always tell dd to only write > 33GB per tape: > > gzip < file | > ( > dd of=/dev/ersa0 bs=64k count=$((33000000/64)) > echo "please insert next tape" > head -1 < /dev/tty > /dev/null > ) We don't know how much the tape would really hold. It will likely hold a good deal more than 33GB. Thanks for the ideas! Cheers, -- Jacques Vidrine . NTT/Verio SME . FreeBSD UNIX . Heimdal nectar@celabo.org . jvidrine@verio.net . nectar@freebsd.org . nectar@kth.se
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