Table 71 Dco Error Information Definition - Hitachi HDS723020BLA642 Specifications

Note.
Bits 7:0 of this word contain the value A5h. Bits 15:8 of this word contain the data structure checksum. The data
structure checksum is 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 is added with unsigned arithmetic, and overflow is ignored. The
sum of all bytes is zero when the checksum is correct.
Cylinder high
Cylinder low
Sector number
Sector count

Table 71 DCO error information definition

invalid word location
invalid bit location (bits (15:8))
invalid bit location (bits (7:0))
error reason code & description
01h DCO feature is frozen
02h Device is now Security Locked mode
03h Device's feature is already modified with DCO
04h User attempt to disable any feature enabled
05h Device is now SET MAX Locked or Frozen mode
06h Protected area is now established
07h DCO is not supported
08h Subcommand code is invalid
FFh other reason
Hitachi hard disk drive specifications
117