Epson 10020 User Manual

This test checks the ability 

of 

the hard disk 

drive to detect a

read/write error and to correct the data accordingly.

Note

This test destroys some data on the innermost cylinder of the

selected hard disk drive. This cylinder is reserved for
diagnostics, and is never used for storage by MS-DOS.

Therefore, data created by MS-DOS is not destroyed.

Select option 3 from the menu to start this test. You see these
messages:

The data on the highest physical cylinder

may be destroyed by this check.

Enter Y to start this check.

Enter N to return to the menu.

Press Y and 

then Enter to continue with the test. If no errors

occur, the program returns to the menu.

An error occurs only if the drive is malfunctioning. In this case,
back up all your files, and have the drive serviced immediately.

(The drive may be corrupting your data.)

This test reads and verifies data from all tracks of the disk,

checking each cylinder and using both heads.

Select option 4 from the menu to start this test. The program

displays the number of each cylinder it finds. For example, with

a 20MB hard disk, the first message you see is:

Current cylinder is 614

The cylinder number counts down to 0.