Hitachi C4K60 Specifications - Page 94

Security Set Password [F1h]

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7.5.32. Security Set Password [F1h] Task File Registers Command LBA High LBA Mid LBA Low Device/Head Sector Count Features 7 6 5 4 3 2 1 0 F1h XX XX XX X X X DRV X X X X XX XX The SECURITY SET PASSWORD command requests a transfer of a single sector of data from the host. The following table defines the content of this sector of information. The data transferred controls the function of this command. The revision code field is returned in the IDENTIFY DEVICE Word 92. The valid revision codes are 0000h to FFFDh. The initial factory shipped value of Master Password Revision code is FFFEh. Value FFFFh is revised. Table 7.22 Password Data Format Word 0 1-16 17 18 - 255 Contents Control Word bit 15-9 Reserved bit 8 Security Level 0 = High, 1 = Maximum bit 7 Reserved bit 0 Identifier 0 = Set user password, 1 = Set master password Password(32bytes) Mater Password Revision Code (Valid if word 0 bit 0 = 1) Reserved The following table defines the interaction of the identifier and security level bits. Identifier User User Master Security Level High Maximum High or Maximum Table 7.23 Security Level and Identifier Command Result The password supplied with the command is saved as the new user password. The lock function will be enabled from the next power-on or hardware reset. The device will then be unlocked by either the user password or the previously set master password. The password supplied with the command is saved as the new user password. The lock function will be enabled from the next power-on or hardware reset. The device will then be unlocked by only the user password. The master password previously set is still stored in the device but shall not be used to unlock the device. This combination set a mater password, but will not enable the security mode feature. The security level is not changed. Master password revision code set to the value in Master Password Revision Code field. The device returns aborted command error if the device is in Locked mode or Frozen mode. K6610170 Rev.2 Dec 22, 2004 - 94 -

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K6610170
Rev.2
Dec 22, 2004
- 94 -
7.5.32. Security Set Password [F1h]
Task File Registers
7
6
5
4
3
2
1
0
Command
F1h
LBA High
XX
LBA Mid
XX
LBA Low
XX
Device/Head
X
X
X
DRV
X
X
X
X
Sector Count
XX
Features
XX
The SECURITY SET PASSWORD command requests a transfer of a single sector of data from the host. The
following table defines the content of this sector of information. The data transferred controls the function of this
command. The revision code field is returned in the IDENTIFY DEVICE Word 92.
The valid revision codes are
0000h to FFFDh. The initial factory shipped value of Master Password Revision code is FFFEh.
Value FFFFh is
revised.
Table 7.22 Password Data Format
Word
Contents
0
Control Word
bit 15-9 Reserved
bit 8
Security Level
0 = High, 1 = Maximum
bit 7
Reserved
bit 0
Identifier
0 = Set user password, 1 = Set master password
1-16
Password(32bytes)
17
Mater Password Revision Code (Valid if word 0 bit 0 = 1)
18 - 255
Reserved
The following table defines the interaction of the identifier and security level bits.
Table 7.23 Security Level and Identifier
Identifier
Security Level
Command Result
User
High
The password supplied with the command is saved as the new user
password. The lock function will be enabled from the next power-on or
hardware reset.
The device will then be unlocked by either the user
password or the previously set master password.
User
Maximum
The password supplied with the command is saved as the new user
password. The lock function will be enabled from the next power-on or
hardware reset. The device will then be unlocked by only the user
password. The master password previously set is still stored in the device
but shall not be used to unlock the device.
Master
High or
Maximum
This combination set a mater password, but will not enable the security
mode feature.
The security level is not changed. Master password
revision code set to the value in Master Password Revision Code field.
The device returns aborted command error if the device is in Locked mode or Frozen mode.