Date: Thu, 25 Mar 1999 12:42:42 -0800 (PST) From: Matthew Jacob <mjacob@feral.com> To: Darryl Okahata <darrylo@sr.hp.com> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: Travan-20 tape streamer: unit not ready Message-ID: <Pine.LNX.4.04.9903251237580.8651-100000@feral-gw> In-Reply-To: <199903252004.MAA21578@mina.sr.hp.com>
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> Matthew Jacob <mjacob@feral.com> wrote: > > > Uh- nope: > > > > Palle Girgensohn <girgen@partitur.se> > > > > had the same trouble.. > > Oh, I thought he was having problems with a Travan-like drive. I'm sorry- you're right, but the symptoms are the same! > > > Well- this is a new one for me. I'm wondering whether the media has to be > > formatted- sort of like what the older Sony Beta units had to have happen. > > Try using camcontrol to run format on the media- maybe that'd work? > > You may have touched upon something. The drive responds > differently when you put in a blank tape vs an "initialized" tape. > However, I tried the tests with an initialized tape, although the tape > was initialized under Windows. > > I wonder if the "Invalid field in CDB" error is meaningful. If I > find the time, I'll play with camcontrol to send different LOAD UNLOAD > CDBs to the drive. The CDB for load is very straightforward: 0 opcode (0x1b) 1 Immed 2 3 4 EOT|RETEN|LOAD 5 Basically, we either set LOAD (to load to BOT) or clear LOAD (to unload the tape). We don't fool around with immediate, EOT or Retension. The LOAD command is 'optional'. The Rewind command is mandatory. What disturbs me more is the rejection of the Rewind command. What this means is that these devices are *so* broken likely that if you issue a 'load' command, it sends the device into the weeds. Try commenting out the Load and lemme know what happens. Man, the quality of tape devices is getting worse and worse. I'm almost inclined to *not* try and support these devices because if they're this bad, why should you trust your data to them? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the messagehelp
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