Date: Sun, 22 Sep 1996 14:38:40 +0200 (MET DST) From: Robert Eckardt <roberte@mep.ruhr-uni-bochum.de> To: tito@agi.es Cc: questions@FreeBSD.org Subject: Re: TANDBERG TDC3600 - need multiple 512 Message-ID: <199609221238.OAA00975@ghost.mep.ruhr-uni-bochum.de> In-Reply-To: <199609220957.LAA11492@allegro.lemis.de> from Greg Lehey at "22. Sep. 96 11:57:13"
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> TITO writes: > > > > > > I've a problem with make a tar backup to streamer TANDBERG. > > > > > > When I use the option z ( to make tar with gzip ), the system returns this > > bug. > > > > input/output error - must be multiple 512 > > Interesting one. First, what it means: the driver wants a write > length which is a multiple of 512 bytes. That works well enough with > tar normally, but not if you compress, in which case it writes in > dribs and drabs. You can fix it with: > > tar czf - <files> | dd obs=20b of=/dev/rst0 > > This will force a block size of 20 blocks. Or you could use (from tar --help): --block-compress block the output of compression program for tapes Therefore, 'tar -czf /dev/rst0 --block-compress <files>' works (for me) (except that compression on my 486 stops the tape from streaming :-) Robert
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