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5.22 Read Native Max ADDRESS (F8h)
Table 62: Read Native Max ADDRESS (F8h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
7
6
5
CRC UNC
0
0
0
0
This command returns the native max LBA/CYL of the drive which is not effected by the Set Max ADDRESS
command.
If the 48-bit native max address is greater than 268,435,455, the Read Native Max Address command returns a
value of 268,435,455.
Input parameters from the device
Sector Number
Cylinder High/Low
H
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 L 1 D - - - -
1 1 1 1 1 0 0 0
Error Register
4
3
2
1
IDN
0
ABT T0N AMN
0
0
V
0
In LBA mode this register contains the native max LBA bits 0–7. (L = 1)
In CHS mode this register contains the native max sector number. (L = 0)
In LBA mode this register contains the native max LBA bits 8–15 (Low) and bits 16–23
(High). (L = 1)
In CHS mode this register contains the native max cylinder number. (L = 0)
In LBA mode this register contains the native max LBA bits 24–27. (L = 1) In CHS mode
this register contains the native maximum head number. (L = 0)
Deskstar 7K500 Hard Disk Drive Serial ATA Addendum
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
0
7
6
BSY RDY DF DSC DRQ
0
0
V
98
7 6 5 4 3 2 1 0
- - - - - - - -
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
- - - - H H H H
see below
Status Register
5
4
3
2
COR IDX
0
-
-
0
1
0
ERR
-
V
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