Date: Mon, 31 Jul 1995 10:42:22 -0700 From: Tony <tony@rtd.com> To: freebsd-bugs@freebsd.org Subject: Re: SCSI Tape bug. Message-ID: <199507311742.KAA06652@seagull.rtd.com>
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: Mike Pritchard : My fix also corrected some problems with some of the "quirky" 525MB 1/4" : drives, according to Joerg Wunsch, which I thought it might when : I wrote the fix. Since I don't have access to anything really : fancy or state of the art (just an old Archive 2150s), I can't verify : if the above fix corrects some of the other "odd" SCSI tape bugs : that have been reported lately. This is somewhat related (no complaints, just observations) I was using a DEC TLZ07 for a while (2.0.5 FreeBSD) The device probe for st0 would fail if a tape was present in the drive at boot time - error "device offline". Due to the POST memory checks and associated BIOS stuff, the tape was always fully ready by the time of the device probe. I also had other problems reading tapes, sometimes it would read 100%, other times (with the same tape) abort with a kernel unknown blocksize message. I also managed (by ejecting tapes at the wrong time, killing tape jobs etc) to get the system into a state where any write I/O (i.e sync) would fail with an 'I/O error'. If I still had the drive, I'd try some debugging, but it had to go back to work :-( Also, I recall there being some inconsistencies in the st(4) man page, such as the minor devno info for the control device. tony
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