Hitachi DK23DA-30F - 30 GB Hard Drive Specifications page 94

Table 6.19 Device Configuration Set Command Data Structure (Continued)
Word
Integrity word
255
bit 15 - 8 Checksum
bit 7 - 0 Signature Code
Error Outputs:
If DEVICE CONFIGURATION FREEZE LOCK is set or If any of the bit modification restrictions described
are violated, the device returns command aborted.
Registers
Cylinder High
Cylinder Low
Device/Head
Sector Number
Sector Count
Sector Count Register:
This register contains vendor unique value by the device.
Cylinder Low Register, Sector Number:
If the command was aborted because an attempt was made to modify a mode or feature that cannot
be modified with the device in its current state, these registers contain bits (15:0) set in the bit
positions that correspond to the bits in the device configuration overlay data structure words 1, 2, or 7
for each mode or feature that cannot be changed. If not, the value is 00h.
Cylinder High Register:
If the command was aborted because an attempt was made to modify a bit that cannot be modified
with the device in its current state, this register contains the offset of the word that cannot be changed.
If not, the value is 00h.
K6602705
Rev.3
08.20.01
The checksum shall be the two's complement of the sum of all byte in words 0
through 254 and the byte consisting of bits 7:0 of word 255. Each byte shall be
added with unsigned arithmetic, and overflow shall be ignored. The sum of all
bytes is zero when the checksum is correct
Bits 7:0 of this word shall contain the value A5h.
7 6
Word Location Number
Bit Location Number bit15 - 8
- X
Bit Location Number bit 7 - 0
XX (Vendor Unique)
Description
5 4 3 2
- DRV XX
- 94 -
1 0