Table 146 Set Max Address Ext Command (37H); Set Max Address Ext (37H) - Hitachi HDS723020BLA642 Specifications
3.5 inch serial ata hard disk drive
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- Datasheet (2 pages) ,
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- Quick installation manual (3 pages)
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11.40 Set Max Address Ext (37h)
Command Block Output Registers
Register
Data Low
Data High
Current
Feature
Previous
Current
Sector Count
Previous
Current
Sector
Number
Previous
Current
Cylinder Low
Previous
Current
Cylinder High
Previous
Device/Head
Command
Error Register
7
6
5
4
CRC
UNC
0
IDN
0
0
0
0
Table 146 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
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.
7
6
5
4
3
2
1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
1
-
D
-
-
-
0
0
1
1
0
1
1
3
2
1
0
ABT
T0N
AMN
0
V
0
Hitachi hard disk drive specifications
Command Block Input Registers
0
Register
-
Data Low
-
Data High
-
Error
-
HOB=0
B
Sector Count
HOB=1
-
HOB=0
V
Sector
Number
HOB=1
V
HOB=0
V
Cylinder Low
HOB=1
V
HOB=0
V
Cylinder High
HOB=1
V
-
Device/Head
1
Status
0
7
6
5
BSY
RDY
DF
0
0
V
0
209
7
6
5
4
3
2
-
-
-
-
-
-
-
-
-
-
-
-
...See Below...
-
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
-
-
-
-
-
-
...See Below...
Status Register
4
3
2
1
DSC
DRQ COR
IDX
-
-
0
-
1
0
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
V
V
-
-
0
ERR
V
- Quick Links:
- Table 1 Type and Model
- General Features
- Data Sheet
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