5K250 (SATA) OEM Specification
Page 114 of 171
14.19 Read Native Max Address (F8h)
Block Output Registers Command Command Block Input Registers
Register 7 6 5 43210 Register 7 6 5 4 3 210
Data - - - ----- Data - - - - - ---
Feature - - - ----- Error ...See Below...
Sector Count - - - ----- Sector Count - - - - - ---
LBA Low - - - ----- LBA Low V V V V V VVV
LBA Mid - - - ----- LBA Mid V V V V V VVV
LBA High - - - ----- LBA High V V V V V VVV
Device - L - ----- Device - - - - H HHH
Command 1 1 1 11000 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 AM
N
BSY RDY DF DSC DRQ COR IDX ERR
0 0 0 0 0 V 0 0 0 V 0 - - 0 0 V
Table 85 Read Native Max Address Command (F8h)
This command returns the native max LBA/CYL of HDD which is not affected by Set Max Address
command.
The 48-bit native max address is greater than 268,435,455, the Read Native Max Address command
return a value of 268,435,455.
Output Parameters To The Device
L
LBA mode.Indicates the addressing mode.L=0 specifies CHS mode and L=1 does LBA
addressing mode.
D
The device number bit. Indicates that the device number bit of the Device Register
should be specified. D=0 selects the master device and D=1 selects the slave device.
-
Indicates that the bit is not used.
Input Parameters From The Device
LBA Low
In LBA mode, this register contains native max LBA bits 0 - 7. (L=1)
In CHS mode, this register contains native max LBA Low. (L=0)
LBA High/Mid
In LBA mode, this register contains native max LBA bits 8 - 15 (Mid), 16 - 23 (High).
(L=1)
In CHS mode, this register contains native max cylinder number. (L=0)
H
In LBA mode, this register contains native max LBA bits 24 - 27. (L=1)
In CHS mode, this register contains native max head number.(L=0)
V
Valid. Indicates that the bit is part of an input parameter and will be set to 0 or 1 by the
device.
-
Indicates that the bit is not used.
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