420 Series 2-17
2.6 Hard Disk Drive Troubleshooting
To determine if the hard disk drive is functioning properly, perform the procedures below
starting with Procedure 1. Continue with the other procedures as instructed.
Procedure 1: Partition Check
Procedure 2: Message Check
Procedure 3: Format Check
Procedure 4: Diagnostic Test Program Execution Check
NOTE: The contents of the hard disk will be erased when the HDD troubleshooting
procedures are executed. Transfer the contents of the hard disk to a floppy disk(s)
using the BACKUP command in the Toshiba companion utility. Refer to the User’s
Manual for more information about how to perform the BACKUP.
Procedure 1 Partition Check
Insert the Toshiba MS-DOS system disk, turn on the computer, and perform the following
checks:
Check 1 Type C: and press Enter. If you cannot change to drive C, go to Check 2. If you
can change to drive C, go to Procedure 2.
Check 2 Type FDISK and press Enter. Choose Display Partition Information from the
FDISK menu. If drive C is listed, go to Check 3. If drive C is not listed, return to
the FDISK menu and choose the option to create a DOS partition on drive C.
Recheck the system. If the problem still exists, go to Procedure 2.
Check 3 If drive C is listed as active in the FDISK menu, go to Check 4. If drive C is not
listed as active, return to the FDISK menu and choose the option to set the active
partition for drive C. Recheck the system. If the problem still exists, go to Proce-
dure 2.
Check 4 Remove the system disk from the FDD and cold boot the computer. If the prob-
lem still exists, go to Procedure 2. Otherwise, the HDD is operating normally.
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