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12.51 Set Max Address Ext (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 device
receives this command, all accesses beyond that Address are rejected with setting ABORT bit in status register.
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.
The device returns the command aborted for a second non-volatile Set Max Address Ext command until next power
on or hardware reset.
Table 219 Set Max Address Ext Command (37h)
Command Block Normal Outputs
Command Block Command Input
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
-
-
-
-
-
-
-
-
HOB=0
V
V V
V
V
V
V
V
Sector Number Current
V
V
V
V V
V
V
V
Sector
Number
Previous
V
V
V
V
V
V V
V
HOB=1
V
V
V
V V
V
V
V
HOB=0
V
V V
V
V
V
V
V
Cylinder Low
Current
V
V
V
V V
V
V
V
Cylinder
Low
Previous
V
V
V
V
V
V V
V
HOB=1
V
V
V
V V
V
V
V
HOB=0
V
V V
V
V
V
V
V
Cylinder High
Current
V
V
V
V V
V
V
V
Cylinder
High
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
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CRC UNC 0
IDN
0
ABT
T0N
AMN
BSY RDY DF
DSC DRQ COR IDX
ERR
0
0
0
0
0
V
0
0
0
V
0
-
-
0
-
V
297
Hard Disk Drive Specification