Read Native Max Address (F8H); Figure 96. Read Native Max Address (F8H) - IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive Specifications

13.17 Read Native Max ADDRESS (F8h)

Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 96. Read Native Max ADDRESS (F8h)

This command returns the native max LBA/CYL of HDD which is not effected by the Set Max ADDRESS
command. Even if the Address Offset mode is enabled, the native max LBA/CYL of HDD is returned.
Output Parameters To The Device
L
D
-
Input Parameters From The Device
Sector Number
Cylinder High/Low
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 L 1 D - - - -
1 1 1 1 1 0 0 0
4 3 2 1
IDN 0 ABT T0N AMN
0 0 V 0
LBA mode. This indicates the addressing mode. An L = 0 specifies CHS mode
and L = 1 specifies the LBA addressing mode.
This is the device number bit. Indicates that the device number bit of the Device/
Head Register should be specified. D = 0 selects the master device and D = 1
selects the slave device.
Indicates that the bit is not used.
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)
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6 5
BSY RDY DF
0 0 V 0
145
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
4 3 2 1 0
DSC DRQ COR IDX ERR
- - 0 - V