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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