Dell Precision R5500 Owner's Manual page 73

Unexpected interrupt in protected mode
Description The keyboard controller may be malfunctioning or a memory module may be loose.
WARNING: Dell's Disk Monitoring System has detected
that drive [0/1] on the [primary/secondary] EIDE
controller is operating outside of normal specifications. It
is advisable to immediately back up your data and replace
your hard drive by calling your support desk or Dell.
Description During initial startup, the drive detected possible error conditions. When your computer finishes booting,
immediately back up your data and replace your hard drive (for installation procedures, see "Adding and Removing
Parts" for your computer type). If no replacement drive is immediately available and the drive is not the only
bootable drive, enter System Setup and change the appropriate drive setting to None. Then remove the drive
from the computer.
Write fault
Description The operating system cannot write to the floppy or hard drive.
Write fault on selected drive
Description The operating system cannot write to the floppy or hard drive.
X:\ is not accessible. The device is not ready
Description The floppy drive cannot read the disk. Insert a floppy disk into the drive and try again.
Troubleshooting 73