Section 14 — Storage
Disk Messages
23
• FILE OPERATION ERROR — one of a number of possible fatal errors occurred during a disk
operation. Probably caused by a low-level hardware or software error, although the disk may
be bad.
• DISK ERROR - BAD DATA — during a file operation, the CRC (error checking code) of the
data block was incorrect. Probably indicates a bad disk sector. The file may be unusable.
• DISK ERROR - BAD DISK O.S. — during a file operation, the CRC of the Disk OS Program
Control Block was incorrect. Probably indicates a bad disk sector. The disk may be unusable.
• DISK ERROR - BAD DIRECTORY— during a file operation, the CRC of the Directory blocks
was incorrect. Probably indicates a bad disk sector. The disk may be unusable.
• DISK ERROR - BAD FAT — during a file operation, the CRC of the FAT (File Allocation Table)
block was incorrect. Probably indicates a bad disk sector. The disk may be unusable.
• DISK ERROR - BAD DEVICE ID — during a file operation, the CRC of the Device ID block
was incorrect. Probably indicates a bad disk sector. The disk may be unusable.
• FORMAT FAILED - BAD DISK — during formatting, a bad disk sector was detected. The disk
may be defective, and should not be used.
• O.S. NOT ON DISK — the system was unable to LOAD the O.S. file. The file may be
unusable.
• DISK COPY NOT COMPLETED — appears if Cancel•No is pressed during the Disk Copy
procedure.