Identify Device Data; Exceptions In Address Offset Mode; Table 58: Device Address Map Before And After Set Feature - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

Disable Address Offset Feature removes the address offset and sets the size of the drive reported by the Identify
Device command back to the size specified in the last nonvolatile Set Max Address command.

Table 58: Device address map before and after Set Feature

11.11.2 Identify Device Data

Identify Device data, word 83, bit 7 indicates the device supports the Address Offset Feature. Identify Device data,
word 86, bit 7 indicates the device is in Address Offset mode.

11.11.3 Exceptions in Address Offset Mode

Any commands which access sectors across the original native maximum LBA are rejected with error, even if the
access protection is removed by a Set Max Address command.
Read Look Ahead operation and Write Cache Function are not carried out in Address Offset mode, even if they are
enabled by the Set Feature command.
Travelstar 4K120 Hard Disk Drive Specification
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