IBM DTCA-24090 Hard Drive Specifications - Page 141

Security Set Password

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12.23 Security Set Password (F1h) Command Block Output Registers Register 76543210 Data Feature Sector Count Sector Number Cylinder Low Cylinder High Device/Head 1 1D Command 11110001 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 00000V00 Status Register 76543210 BSY RDY DF DSC DRQ COR IDX ERR 0V0 0 V Figure 85. Security Set Password Command (F1h) The Security Set Password command enables security mode feature (device lock function), and sets the master password or the user password. The security mode feature (device lock function) is enabled by this command, and the device is not locked immediately. The device is locked after next power on reset or hard reset. When the MASTER password is set by this command, the master password is registerred internally, but the device is N O T locked after next power on reset or hard reset. This command requests a transfer of a single sector of data from the host including the information specified in Figure 86 on page 134. The data transferred controls the function of this command. Command Descriptions 133

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12.23
Security Set Password
(F1h)
Command Block Output Registers
Command Block Input Registers
Register
76543210
Register
76543210
Data
Data
Feature
Error
...See Below...
Sector Count
Sector Count
Sector Number
Sector Number
Cylinder Low
Cylinder Low
Cylinder High
Cylinder High
Device/Head
1
1D
Device/Head
Command
11110001
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 85. Security Set Password Command (F1h)
The Security Set Password command enables security mode feature (device lock function), and sets the
master password or the user password.
The security mode feature (device lock function) is enabled by this command, and the device is not locked
immediately.
The device is locked after next power on reset or hard reset.
When the MASTER password is
set by this command, the master password is registerred internally, but the device is NOT locked after next
power on reset or hard reset.
This command requests a transfer of a single sector of data from the host including the information specified
in Figure 86 on page 134.
The data transferred controls the function of this command.
Command Descriptions
133