Date: 20 Jan 2002 23:47:00 -0800 From: swear@blarg.net (Gary W. Swearingen) To: stable@freebsd.org Subject: "wc /dev/acd0c" hangs device until reboot Message-ID: <50g050kux7.050@localhost.localdomain>
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This is on a 4.5-PRERELEASE from about Wed Dec 26 18:41:29 PST 2001
built with CPUTYPE=k6-2.
I burned a CD-RW with burncd, did a "diff xxx /dev/acd0c" and then
thought I'd try to see how long a "file" it put on the CD with
"wc /dev/acd0c" at which point it hung the device. I killed -9 the
wc and xterm process but I could not make it kill the wc process or
otherwise allow me to use the CD ("device busy"). Nothing strange
in /var/log/messages. Had to reboot.
That was yesterday. Today it hung up again (until rebooted) during
a "burncd". In both cases I noticed that that hung process had a ps
status of "DL".
Maybe related: I've only burned a couple CDs (CD-Rs) a month for the
last several, but the last two days I've been messing with 2x and 4x
CD-RWs (which worked well under Linux on same hardware) and burncd has
not been working well. Sometimes blanks OK, other times I have to try
several times on the same CD-RW. With CD-Rs, it failed to write several
until I got that blank (sometimes saying it wrote -1), until it
hung. After reboot, I tried burning before starting X11 and had no more
problems (buring three CD-Rs which were the same disks that failed to
burn earlier). (They all were checked with "diff" without error.)
ad0: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata0-master tagged UDMA33
acd0: CD-RW <8X4X32> at ata1-master using PIO4
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