Address Offset Feature (Vendor Specific) - IBM DJSA-210 - Travelstar 10 GB Hard Drive Specifications

11.10 Address Offset Feature (vendor specific)

Computer systems perform initial code loading (booting) by reading from a predefined address on a disk
drive. To allow an alternate bootable operating system to exist in a reserved area on a disk drive this
feature provides a Set Features function to temporarily offset the drive address space. The offset address
space wraps around so that the entire disk drive address space remains addressable in offset mode. The
Set Max pointer is set to the end of the reserved area to protect the data in the user area when operating
in offset mode. This protection can be removed by a Set Max Address command to move the Set Max
pointer to the end of the drive. But any commands which access sectors across the original native
maximum LBA are rejected with error, even if this protection is removed by a Set Max Address command.
Travelstar 32GH/30GT/20GN hard disk drive specifications
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