Number of heads (1-16):4 (RET)
Number of cylinders: 615 (RET)
For other disk drives see the Disk Drive OEM Manual for these values.
In this case, the drive has four data heads and 615 cylinders. Minimum
value of cylinders=1, maximum = 2048.
The following prompts allow the user to specify the method of entering
a defect list, it may put in a separate file or entered from the keyboard.
Specify the Defect Byte Offset encoding: MFM or RLL
(M/R)? M or R (RET)
All drive manufacturers give a list of defective areas on the drive
disk. This defect list gives the location of defects in one of two
forms. One form is cylinder, head and byte offset. Normally the byte
offset is given in MFM encoding. Many drive vendors are also giving
the byte offset in RLL encoding. Either MFM or RLL encoding can be
used. If MFM is used, the controller multiplies by 1.5 to determine
the RLL equivalent defect.
If no defect list is available, press "M" then "C" and two (RET)'s.
The controller will flag defects that it finds during track verification
in data and ID fields. This does not guarantee that all defects will
be detected and mapped. Drive manufacturers do more rigorous analog and
temperature testing to create their defect lists.
Enter defect list as "Cyl/Head/Byte" or "Head/Cyl/Byte"
(C or H): C or H (RET)
Type defect file name or press Enter:
Enter the defect list in the format selected above, i.e., cyl/head/byte
or head/cyl/byte. The cylinder, head and byte offset are separated by
"/" marks. For example, 31/2/4054 means cylinder 31 head 2 and 4054
The defect list may reside in a DOS file or be inputted from the keyboard. If a DOS file is used, enter its' name here. The DOS file is
entered by a carriage return as shown below. The file name must have an
If entering from the keyboard, press (RET) and then following will be
Enter defect locations as Cyl/Head/Byte (or Head/Cyl/Byte)
(a blank line will end the list):
Are the above parameters correct (Y/N)? Y or N
An "N" will return to the beginning of the format program. When "Y"
is selected, the following will be shown:
The drive is now being formatted. When finished, the track verification
begins, this takes approximately 40 seconds per Megabyte.
The track verification takes longer than most controllers. The reason
for this is that an extensive check is being made using "worse" case data
During track verification the following will be shown:
Verifying Format in Logical Unit 0....
Verifying Format is Logical Unit X.....
Run this Program Again (Y/N)? Y or N
Now the primary format is complete. If needed, rerun the format for drive 1.
When finished, answer 'N' to return to the DOS>A prompt and continue.
If defects occuring during format, the following text will appear on
Reformatting Track - Cylinder XXXX, Head XX, Sector XX
(When 27 sectors are used)
Formatting ALT Track - Cylinder 611, Head 3
(When alternate track is assigned)
Alternate tracks have reduced the total drive capacity.
Verifying Format is Logical Unit X...
*Verify Error - Logical Unit X, Cylinder XXXX, Head XX,
Controller Error Code: 91, BIOS Error Code: 10
The cylinder number is the physical, not the logical, cylinder number
of the drive. BIOS error codes are found in Table 5.
BIOS ERROR CODES