Date: Sun, 29 Oct 1995 19:22:41 -0800 (PST) From: Julian Elischer <julian@ref.tfs.com> To: uhclem%nemesis@fw.ast.com (Frank Durda IV) Cc: jmb@kryten.atinc.com, current@freebsd.org Subject: Re: WANGDAT strangeness Message-ID: <199510300322.TAA09534@ref.tfs.com> In-Reply-To: <m0t9kN5-000IwpC@nemesis.lonestar.org> from "Frank Durda IV" at Oct 29, 95 08:54:00 pm
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>
> [0]a WangDAT tape drive that under 2.0.5 won't let you remove the media until
> [0]you reboot the system, OR you can issue a mt offline, remove the media, and
> [0]then reboot to get the drive to load new media - that really stinks and
>
This is correct see later..
> [1] this problem must be unique to WangDAT or at least non-exabyte
> [1]4mm tape drives. i use a 4mm for daily backup. unload the tape with
> [1]"/usr/bin/mt -f /dev/rst0 rewoffl". load a new tape every morning and
> [1]haev no problems at all.
no he probably hasn't tried to do an mt offline yet.
>
> [2]The DAT drive has a READY and an ACCESS light. Under SCO, the READY light
> [2]would blink yellow while loading/unloading, then remain green until the
> [2]media is unmounted. The ACCESS light only blinked during
> [2]commands/transfers, etc. So when the drive is idle (tape loaded or
> [2]unloaded), the ACCESS light is dark.
ok, so SCO is broken.. so?
> [2]
> [2]On 2.0.5-R, the ACCESS light is off until you touch the drive, then it
> [2]goes on solid and remains on regardless of activity. Once the drive is
> [2]touched, the front-panel eject button no longer works. (From external
> [2]appearances, it acts like it is always in the middle of processing a
> [2]command from the host.)
no, it is stopping joe-random from pushing the eject button while you are
part-way through your set of 'dump's .
if you want to you can easily re-enable the button..
(try mt -f /dev/nrst0 offline)
> [3][snip]
> [2]I have been using the DAT drive for about four years under SCO UNIX with
> [2]their standard driver, so I know that the drive works well.
it's working ok, we just expect it to actidifferently than you do..
>
> [3] the wangdat drive may have broken firmware...my toshiba cdrom
> [3]does. i had to patch the kernel to overcome it...the drive claimed to be
> [3]a hard disk! how about sending in the dmesg output, boot with -v, please.
what devices are you using?
read the man page for st
( man 4 st)
read carefully about a 'mount session' and tapes.
As long as a mount session is in progress the 'eject' button is dissabled
This is as it should be
End the mount session by:
accessing /dev/rst0 (not nrst0)
using the mt command to take the tape offline.
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