IBM DTCA-24090 Hard Drive Specifications - Page 148

Set Max LBA/CYL F9h: Vendor Specific

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12.27 Set Max LBA/CYL (F9h: Vendor Specific) Command Block Output Registers Register 76543210 Data Feature Sector Count B Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head 1L1DHHHH Command 11111001 Command Block Input Registers Register 76543210 Data Error ...See Below... Sector Count Sector Number V V V V V V V V Cylinder Low V V V V V V V V Cylinder High V V V V V V V V Device/Head HHHH Status ...See Below... Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0 0 V Figure 91. Set Max LBA/CYL (F9h) This command overwrites the max LBA/CYL of H D D in a range of actual device capacities. Once device receives this command, all accesses beyond that LBA/CYL are rejected with setting ABORT bit in status register. Identify device command and Identify device D M A command returns the LBA/CYL which is set via this command as a default value. Read Native Max LBA/CYL command should be issued and completed immediately prior to issuing Set Max LBA/CYL command. If the device receives Set Max LBA/CYL command without a prior Read Native Max LBA/CYL command, the device aborts the Set Max LBA/CYL command. In CHS mode,Cylinder High,Cylinder Low specify the max cylinder number. The Head number of DEVICE/HEAD and Sector Number are ignored. The default value(See default CHS in Identify device information) is used for that. In LBA mode,the Head number of DEVICE/HEAD , Cylinder High, Cylinder Low and Sector Number specify the max LBA. This command will be set this LBA sa the max LBA of the device. Output Parameters To The Device B Option bit for selection whether nonvolatile or volatile. B = 0 is volatile condition. When B = 1 , MAX LBA/CYL which is set by Set Max LBA/CYL command is pre- served by P O R and H A R D RESET. When B = 0 , MAX LBA/CYL which is set by Set Max LBA/CYL command will be lost by P O R and H A R D RESET. 140 OEM Specifications of DTCA-2xxxx 2.5 inch H D D

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12.27
Set Max LBA/CYL (F9h: Vendor Specific)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
B
Sector Count
Sector Number
VVVVVVVV
Sector Number
VVVVVVVV
Cylinder Low
VVVVVVVV
Cylinder Low
VVVVVVVV
Cylinder High
VVVVVVVV
Cylinder High
VVVVVVVV
Device/Head
1L1DHHHH
Device/Head
HHHH
Command
11111001
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
Figure 91. Set Max LBA/CYL (F9h)
This command overwrites the max LBA/CYL of HDD in a range of actual device capacities. Once device
receives this command, all accesses beyond that LBA/CYL are rejected with setting ABORT bit in status
register.
Identify device command and Identify device DMA command returns the LBA/CYL which is set
via this command as a default value.
Read Native Max LBA/CYL command should be issued and completed immediately prior to issuing Set
Max LBA/CYL command. If the device receives Set Max LBA/CYL command without a prior Read
Native Max LBA/CYL command, the device aborts the Set Max LBA/CYL command.
In
CHS
mode,Cylinder
High,Cylinder
Low
specify the
max
cylinder number.
The
Head
number
of
DEVICE/HEAD and Sector Number are ignored.
The default value(See default CHS in Identify device
information) is used for that.
In LBA mode,the Head number of DEVICE/HEAD , Cylinder High, Cylinder Low and Sector Number
specify the max LBA.
This command will be set this LBA sa the max LBA of the device.
Output Parameters To The Device
B
Option bit for selection whether nonvolatile or volatile.
B = 0 is volatile condition.
When B=1, MAX LBA/CYL which is set by Set Max LBA/CYL command is pre-
served by POR and HARD RESET. When B=0, MAX LBA/CYL which is set by
Set Max LBA/CYL command will be lost by POR and HARD RESET.
140
OEM Specifications of DTCA-2xxxx 2.5 inch HDD