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Tests and Diagnostics
3-180 [CONFIDENTIAL] PORTEGE M780 Maintenance Manual (960-809)
5) Partial read
This subtest reads 1GB data that is in minimum, middle and maximum address of the HDD
area.
6) Write specified address
This subtest writes specified data to a specified cylinder and head on the HDD.
7) Read specified address
This subtest reads data, which has been written to a specified cylinder and head on the HDD.
8) Sequential write
This subtest writes specified 2-byte data to all of the cylinders on the HDD.
9) W-R-C specified address
This subtest writes data to a specified cylinder and head on the HDD, then reads the data and
compares it to the original data.
[ HDC Status ]
An error occurs during the HDD test, the following message is displayed.
Note: For the serial ATA, this message is not displayed correctly.
HDC status = X X X X HDC error register (P – 1f7h)
HDC status register (P – 1f1h)