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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yarrina.connect.com.au!munnari.OZ.AU!news.hawaii.edu!ames!agate!howland.reston.ans.net!Germany.EU.net!zib-berlin.de!irz401!uriah.heep!not-for-mail From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc,comp.os.linux.hardware Subject: Re: Tape backup speed FreeBSD v. Linux Date: 12 Nov 1995 23:44:09 +0100 Organization: Private FreeBSD site, Dresden. Lines: 24 Message-ID: <485tbp$mjc@uriah.heep.sax.de> References: <1995Oct30.090118.28117@state.systems.sa.gov.au> <475sp3$736@news.rrz.uni-koeln.de> <47ppb9$gj@knobel.gun.de> NNTP-Posting-Host: uriah.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:8628 comp.os.linux.hardware:20973 Andreas Klemm <andreas@knobel.gun.de> wrote: >I recommend using dump on FreeBSD with a maximum block size of >32Kbyte. If you use a larger blocksize, restore isn't able to >restore the data. There seems to be something wrong in >/sys/scsi/st.c (?). But it's not as tragic as it sounds, since >one can _do_ fine and _fast_ backups with a blocksize of 32K ;-) Sorry to oppose you in public instead of private mail first, but: not confirmed. I've recently been playing with tape block sizes, and i cannot confirm your observation. A block size of 96 k actually resulted in the driver using only 64 k (since this is the maximum it does support), but apart from this, everything worked well. This was with some HP DAT drive (forgot the model #, it's a 2 GB drive) on an AHA2940. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)