Date: Tue, 30 Mar 2004 13:00:15 -0500 From: Jesse Guardiani <jesse@wingnet.net> To: Dan Nelson <dnelson@allantgroup.com> Cc: freebsd-questions@freebsd.org Subject: Re: tcopy tape to tape WAY too slow Message-ID: <200403301300.16163.jesse@wingnet.net> In-Reply-To: <20040330153932.GE19463@dan.emsphone.com> References: <c4c00b$4ug$1@sea.gmane.org> <20040330153932.GE19463@dan.emsphone.com>
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On Tuesday 30 March 2004 10:39, you wrote: > In the last episode (Mar 30), Jesse Guardiani said: > > I'm copying 35G/90G AIT-1 tapes on FreeBSD from tape drive to tape > > drive (nrsa0 and nrsa1) using the tcopy -c command and it's taking > > WAY too long. Over 12 hours including the verification process. (not > > sure exactly how long as it finished when I was sleeping) > > > > Is there something I can do to speed this up? > > I don't think tcopy is double-buffered; if you only have one file on > that tape and know the blocksize, dd if=/dev/nrsa0 bs=##k | dd > of=/dev/nrsa0 bs=##k should be much faster. No, I've got between 70 and 90 files per tape. > If you have multiple files > or unknown blocksizes, the cptp command from the MAG package at > http://www.cs.vu.nl/~dick/mag.html will preserve filemark and blocksize > info through pipes, so you could do a cptp | cptp pipe. That looks promising. Do you have special build instructions for this package under FreeBSD 4.x? I'm getting the following error on 'gmake' or 'make': ------------------------------------------------------------- gcc -ansi -DUNIX -O -s -c tperr.c tperr.c:18: initializer element is not constant *** Error code 1 Stop in /usr/local/src/mag. Exit 1 ------------------------------------------------------------- -- Jesse Guardiani, Systems Administrator WingNET Internet Services, P.O. Box 2605 // Cleveland, TN 37320-2605 423-559-LINK (v) 423-559-5145 (f) http://www.wingnet.net
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