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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.ecn.uoknor.edu!news.cis.okstate.edu!newsfeed.ksu.ksu.edu!news.physics.uiowa.edu!math.ohio-state.edu!uwm.edu!spool.mu.edu!newshub.tc.umn.edu!fu-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: HP Colorado T4000s Tape Drive error messages Date: 3 Aug 1996 19:47:46 GMT Organization: Private BSD site, Dresden Lines: 39 Message-ID: <4u0ad2$qnk@uriah.heep.sax.de> References: <4tiljn$l48@purple.marble.net> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E dbrockus@cyberhall.com (David Brockus) wrote: > cyber1# mt status > Present Mode: Density = 0x45 Blocksize = 512 bytes I think this density value is too high for the `st' driver. Have a look into the driver source, it (stupidly) rejects densities > 0x17 or so. Simply remove this restriction and see if it would help. > st0(ahc0:4:0): ILLEGAL REQUEST asc: 24,0 Invalid field in CDB > st0: Cannot set selected mode > > What is CDB? The SCSI command descriptor block. > Is there a device setup file where I specify the density and blocksize > for each mode? The SCSI code contains some `quirks' for some known tape drives, but i'm pretty sure yours is not mentioned there. > My problem is what do I do with this information? In the man page for > 'mt' that specific bit density is not supported, do I just pick the > closest match? Ah, no, you don't need to tell it to `mt'. SCSI drives are addressed in terms of blocks, so the underlying physics are largely irrelevant. The only use of the different densities in `mt' is that you might select one out of a few possible density values for those drives where this is appropriate. I assume your drive supports only a single density value at all. -- 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. ;-)