IBM IC35L040AVVN07-0 Hard Drive Specifications - Page 129

Format Unit F7h

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11.6 Format Unit (F7h) Command Block Output Registers Register 76543210 Data -------- Feature 00010001 Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 L 1 D - - - - Command 11110111 Command Block Input Registers Register 76543210 Data -------- Error see below Sector Count Sector Number Cylinder Low Cylinder High Device/Head Status see below Error Register 76543210 CRC UNC 0 IDN 0 ABT T0N AMN 0V0V0V0V Status Register 7 6 5 4 3 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 V V V 0 0 -V Figure 98. Format Unit Command (F7h) The Format Unit command initializes all user data sectors after merging reassigned sector location into the defect information of the device and clearing the reassign information. Both new reassign information and new defect information are available immediately after command completion of this command and are used at next power-on reset or hard reset. Previous information of reassign and defect are erased from the device by executing this command. Note that the Format Unit command initializes from LBA 0 to Native MAX LBA regardless of the setting by the Initialize Device Parameter (91h) command or the Set Max Address (F9h) command, so that the protected area defined by these commands is also initialized. Security Erase Prepare (F3h) command should be completed just prior to the Format Unit command. If the device receives a Format Unit command without a prior Security Erase Prepare command the device aborts the Format Unit command. All values in Feature register are reserved and any values other than 11h should not be put into Feature register. This command does not request a data transfer. Command execution time depends on drive capacity. To determine the command time-out value, refer to Word 89 of Identify Device data. Deskstar 120GXP hard disk drive specifications 115

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11.6 Format Unit (F7h)
see below
Status
11110111
Command
--------
Device/Head
1L1D----
Device/Head
--------
Cylinder High
--------
Cylinder High
--------
Cylinder Low
--------
Cylinder Low
--------
Sector Number
--------
Sector Number
--------
Sector Count
--------
Sector Count
see below
Error
00010001
Feature
--------
Data
--------
Data
76543210
Register
76543210
Register
Command Block Input
Registers
Command Block Output
Registers
V
–
0
0
V
V
V
0
V
0
V
0
V
0
V
0
ERR
IDX
COR
DRQ
DSC
DF
RDY
BSY
AMN
T0N
ABT
0
IDN
0
UNC
CRC
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Status Register
Error Register
Figure 98. Format Unit Command (F7h)
The Format Unit command initializes all user data sectors after merging reassigned sector location into
the defect information of the device and clearing the reassign information. Both new reassign information
and new defect information are available immediately after command completion of this command and are
used at next power-on reset or hard reset. Previous information of reassign and defect are erased from
the device by executing this command.
Note that the Format Unit command initializes from LBA 0 to Native MAX LBA regardless of the setting by
the Initialize Device Parameter (91h) command or the Set Max Address (F9h) command, so that the pro-
tected area defined by these commands is also initialized.
Security Erase Prepare (F3h) command should be completed just prior to the Format Unit command. If the
device receives a Format Unit command without a prior Security Erase Prepare command the device
aborts the Format Unit command.
All values in Feature register are reserved and any values other than 11h should not be put into Feature
register.
This command does not request a data transfer.
Command execution time depends on drive capacity.
To determine the command time-out value, refer to Word 89 of Identify Device data.
Deskstar 120GXP hard disk drive specifications
115