Deskstar T7K500 Hard Disk Drive Specification
221
12.39 Set Max Address Ext (37h)
Table 136: Set Max Address Ext command (37h)
This command is immediately preceded by a Read Native Max Address Ext command.
This command overwrites the maximum number of Address of HDD in a range of actual device capacity. Once the
device receives this command, all accesses beyond that Address are rejected with setting ABORT bit in status reg-
ister.
When the address requested is greater than 268,435,455, words (103:100) shall be modified to reflect the requested
value, but words (61:60) shall not be modified. When the address requested is equal to or less than 268,435,455,
words (103:100) shall be modified to reflect the requested value, and words (61:60) shall also be modified.
If this command is not supported, the maximum value to be set exceeds the capacity of the device, a host protected
area has been established by a Set Max Address command, the command is not immediately preceded by a Read
Native Max Address Ext command, or the device is in the Set Max Locked or Set Max Frozen state, the device
shall return command aborted.
If the device in Address Offset mode receives this command with the nonvolatile option, the device returns aborted
error to the host.
The device returns the command aborted for a second non-volatile Set Max Address Ext command until next
power on or hardware reset.
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data Low - - - - - - - - Data Low - - - - - - - -
Data High - - - - - - - - Data High - - - - - - - -
Feature
Current - - - - - - - -
Error see below
Previous - - - - - - - -
Sector
Count
Current - - - - - - - B
Sector
Count
HOB=0 - - - - - - - -
Previous - - - - - - - - HOB=1 - - - - - - - -
Sector
Number
Current V V V V V V V V
Sector
Number
HOB=0 V V V V V V V V
Previous V V V V V V V V HOB=1 V V V V V V V V
Cylinder
Low
Current V V V V V V V V
Cylinder
Low
HOB=0 V V V V V V V V
Previous V V V V V V V V HOB=1 V V V V V V V V
Cylinder
High
Current V V V V V V V V Cylinder
High
HOB=0 V V V V V V V V
Previous V V V V V V V V HOB=1 V V V V V V V V
Device/Head - 1 - D - - - - Device/Head - - - - - - - -
Command 0 0 1 1 0 1 1 1 Status See below ...
Error Register Status Register
7654321 0 76543 21 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
00000V0 0 0V0-- 0- V