Seagate ST9144 manual Sectors×Heads×Cylinders ≤ Total Sectors per Drive, MBytes

6 ST9144 Family Installation Guide, Rev. B

Note that the final drive capacity shown by the CMOS and total sectors cannot exceed the values indicated in the last column of the following table as defined by the following equation:

(Sectors)×(Heads)×(Cylinders) ≤ Total Sectors per Drive

If your BIOS offers a “custom drive” or a “user-defined” drive type, you may use one of the configurations listed below.

	MBytes	CMOS		R/W	Sect./	Total
Model			Cyl.			Sect. /
	(F)	MBytes (F)		Heads	Track
						Drive
ST9051A	42.86	40.87	654	4	32	83,712
ST9051A	42.82	40.84	820	6	17	83,640
ST9052A	42.65	40.67	980	5	17	83,300
ST9077A	64.05	61.09	802	4	39	125,112
ST9096A	85.29	81.34	980	10	17	166,600
ST9144A	127.94	122.02	980	15	17	249,900

The CMOS calculation of drive capacity is based on a variation of the number of bits in a megabyte, for purposes related to drive addressing.

When the drive geometry has been entered into the “user-de- fined” or “custom” drive type, the CMOS may display the calcu- lated drive capacity. This number should correspond with the capacity listed in the “CMOS MBytes (F)” column of the table. Note that the drive provides the user with full capacity as specified in the “Mbytes (F)” column of the table.

After the high-level formatting has been completed, the drive capacity can be verified using the DOS CHKDSK utility.