Date: Fri, 22 Aug 1997 17:09:22 -0700 (PDT) From: Random Junk <jsd@gamespot.com> To: freebsd-questions@freebsd.org Subject: tape backups unbelievably slow Message-ID: <199708230009.RAA03219@hudsucker.gamespot.com>
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i'm backing up a freebsd filesystem to a remote tape drive (exabyte 8500 connected to an IRIX machine) with the following command: dump 0af stage:/dev/nrtape /usr this works, but it's so slow that it's almost useless... dump reports transfer rates around 23k/sec. it takes me over 24 hours to back up a single machine! obviously this is way less than ideal. anybody have any ideas on how to improve performance? i tried initiating the dump from the IRIX machine by ssh'ing into the freebsd box and dumping to stdout, then dd'ing onto the tape with a large blocksize. this worked great -- i was getting almost 200k/sec. unfortunately the resultant tapes weren't readable by restore! (i can dd the contents of the tape onto a disk and then restore from that file, but that requires having several gig free on a disk... obviously another less than ideal situation). -- Jon Drukman jsd@gamespot.com SpotMedia Communications ...I was an infinitely hot and dense dot...
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