Return to BSD News archive
Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!howland.erols.net!news.mathworks.com!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 C1533A DAT tape ? Date: 22 Nov 1996 00:07:06 GMT Organization: Private BSD site, Dresden Lines: 74 Message-ID: <572qra$moi@uriah.heep.sax.de> References: <stanbDzLuJv.CEo@netcom.com> <Dzrx1z.9xv@bri.hp.com> <54rce7$9ta@uriah.heep.sax.de> <564u6k$ev@klemm.gtn.com> <E0pE8u.2H1@bri.hp.com> 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 aslater@jocko.bri.hp.com (Al Slater) wrote: > : My TDC 4222 doesn't have jumpers, to enable or disable data > : compression. So ... can you guess, why it doesn't accept the command ? > Hmm. ISTR you either get the SCSI errors on console ... j@uriah 736% mt comp 0 mt: /dev/nrst0: comp: Invalid argument j@uriah 737% Nov 22 00:44:32 uriah /kernel: st0(ncr0:4:0): ILLEGAL REQUEST asc:1a,0 Parameter list length error Nov 22 00:44:32 uriah /kernel: st0(ncr0:4:0): ILLEGAL REQUEST asc:1a,0 Parameter list length error > If that really is a QIC device, are you _sure_ it does DC? Yep, it does, but only for the 2.5 GB cartridges. Ah well, i think my kernel has SCSI debug enabled... lemme see: First, the MODE SENSE: st0(ncr0:4:0): command: 1a,0,10,0,1c,0-[28 bytes] ------------------------------ 000: 1b 40 10 08 22 00 00 00 00 00 00 00 90 0e 00 00 016: 14 14 00 00 e0 00 38 00 00 00 00 00 Now, the MODE SELECT attempted by my ``mt comp 0'': st0(ncr0:4:0): command: 15,0,0,0,1c,0-[28 bytes] ------------------------------ 000: 00 00 10 08 00 00 00 00 00 00 00 00 10 0e 00 00 016: 14 14 00 00 e0 00 38 00 00 00 00 00 ...and the result: code70 valid0 seg0 key5 ili0 eom0 fmark0 info: 0 0 0 0 followed by 22 extra bytes extra: 0 0 0 0 1a 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 31 The MODE SELECT translates to: 00 mode data length 00 medium type 10 device-specific parameter: buffered mode (obtained from MODE SENSE, should be ignored in MODE SELECT) 08 block descriptor length 00 density: default 00 00 00 number of blocks 00 reserved 00 00 00 block length: variable 10 page 0x10: Device Configuration Page 0e page length 00 active format: (vendor specific) 00 active partition: none 14 write buffer full ratio: 20, obtained from MODE SENSE 14 read buffer empty ratio: -"- 00 00 write delay time e0 DBR | BIS | RSmk (see SCSI-2) 00 gap size: device defined 38 EOD defined = 1, EEG, SEW (see specs) 00 00 00 buffer size at early warning 00 select data compression algorithm: that's what we want (off) 00 reserved Well, i don't get it why this should be an illegal parameter list length... -- 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. ;-)