Toshiba A100 manual Forward sequential 2.Reverse sequential 3.Random

3 Tests and Diagnostics		3.9 Hard Disk Test
Subtest 01	Sequential read
	This subtest is a sequential reading of all the tracks on the HDD starting at track 0
	to maximum track. When all the tracks on the HDD have been read, the test starts
	at the maximum track and reads the tracks on the HDD sequentially back to track
	0.
Subtest 02	Address uniqueness
	This subtest writes unique address data to each sector of the HDD track-by-track.
	The data written to each sector is then read and compared with the original data.
	There are three ways the HDD can be read:

1.Forward sequential 2.Reverse sequential 3.Random

Subtest 03 Random address/data

This subtest writes random data in a random length to random addresses. This data is then read and compared to the original data.

3-26 PORTEGE A100 Maintenance Manual (960-460)