Hitachi HTS542525K9SA00 Specifications page 158

Table 76: DCO error information definition
Cylinder high invalid word location
Cylinder low
invalid bit location (bits 15:8))
Sector number
invalid bit location (bits 7:0))
Sector count
error reason code & description
01h
02h
03h
04h
05h
06h
07h
08h
FFh
DCO feature is frozen
Device is now Security Locked mode
Device's feature is already modified with DCO
User attempt to disable any feature enabled
Device is now SET MAX Locked or Frozen mode
Protected area is now established
DCO is not supported
Subcommand code is invalid
other reason
Deskstar 7K160 Hard Disk Drive Specification
144