Okay... not sure what was going on but have a theory. Here are the steps I took:
Seeing that the cdrom drive was "coming up and going down" (the green access light was
steady for a few minutes and off for another few), I sought to determine what was
causing this.
Shutting the computer down, I "straight clipped" the drive and manually ejected
whatever was in there. Okay, a HFS (Apple) formatted CDROM--I knew this having mounted
this disk two days ago:
% sudo mount -t hfs /dev/cdrom /mnt/cdrom
So in the two days since mounting this disk some sort of system hiccup (my hither to
undocumented reboot) locked it in a perpetual seek.
I restarted following ejecting the disk and bam!... all better. The /dev/cdrom device
file automagically reappeared:
% ls -l /dev/cdrom
lrwxrwxrwx 1 root root 8 Jan 15 14:40 cdrom -> /dev/hdd
I see now that the IRQ issues reported were related to this symbolic device link. The
drive must have been blocking due to the hiccup, which upon further reflection, caused
by an earlier restart in the two day window formally mentioned.
The HFS CD was in the drive and restart is not set to auto mount HFS disks left in the
drive. This actually caused the earlier boot to report the IRQ issues and hose the
device file but I missed it.
Opps. :)
Tim
-----Original Message-----
From: Stone, Timothy
Sent: Wednesday, January 15, 2003 1:27 PM
To: [EMAIL PROTECTED]
Subject: RE: lost /dev/cdrom and IRQ probe anomolies -- please help.
As promised the exact errors reported (pulled from /var/log/dmesg)
...
hda: ST310212A, ATA Disk Drive
hdd: IRQ probe failed (0xfef8)
hdd: IRQ probe failed (0xfef8)
hdd: no response (status = 0x80), resetting drive
hdd: IRQ probe failed (0xfef8)
hdd: no response (status = 0x80)
ide0 at ... on irq 14
...
Looking at this it may not have anything to do with my anomolies.
My drive access light remains solid, but the system monitor does not seem to reflect
this activity. My CDROM seems to be in and out of access, the light comes and goes,
but no /dev/cdrom device exists and I'm not able to mount it.
This is the most disturbing as I can't seem to figure out what took place overnight to
make it "disappear."
Thanks for any help anyone can provide.
Tim
-----Original Message-----
From: Stone, Timothy
Sent: Wednesday, January 15, 2003 11:53 AM
To: Redhat-List (E-mail)
Subject: lost /dev/cdrom and IRQ probe anomolies -- please help.
A couple of things happened overnight...
I had need to load a RPM and attempted to open the CDROM tray
% sudo eject /mnt/cdrom
Well this failed. I could "feel" the drive spinning. So I tried
% sudo umount /mnt/cdrom
This didn't seem to help so I thought... okay, I'll reboot.
Upon rebooting the system briefly hung at the IRQ probe stating
hdd: IRQ probe failed
hdd: IRQ probe failed
hdd: ... resetting drive
(I can post the exact statements as soon as I find the log file with this
information...)
The system paused and then began booting with a green light ("OK") down the board.
Upon reboot, /dev/cdrom and /mnt/cdrom both vanished into the ether. Additionally, the
drive access lights are both light solid (cdrom and hdd).
System performance seems fine and services are running as expected.
Are there any suggestions for further investigations I can take to track down the
reasons for both the IRQ probe failures and the missing /dev/cdrom device? The missing
/dev/cdrom is the most disturbing... I just used the CDROM two days ago, and now it's
gone. (It's possible that the drive is dead, the machine itself is old, but certainly
not at MTBF.)
Warmest Regards,
Tim
--
/**
* Timothy Stone . Sun Certified Java Programmer
* Web Master . tstone at cityofhbg dot com
* City of Harrisburg . 717.255.7297
* Pennsylvania USA . 717.903.9162
*
* "Censorship always defeats its own purpose,
* for it creates in the end the kind of society
* that is incapable of exercising real discretion."
* --Henry Steele Commager, Historian
*/
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