Hitachi T7K250 - Deskstar - Hard Drive Specifications page 135

Table 66: DCO error information definition
Cylinder high invalid word location
Cylinder low invalid bit location (bits 7:0)
Sector Number Invalid bit location (bits 15:8)
error reason code description
Sector count
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
other reason
FFh
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