Hitachi HTS543280L9A300 User Manual

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                       5K320 SATA OEM Specification 
134 
 
14.32  Security Unlock (F2h)   
Command Block Output Registers 
   Command Block Input Registers 
Register 
7  6  5  4  3  2  1  0     Register 
7  6  5  4  3  2  1  0 
Data 
-  -  -  - 
-  -  -     Data 
-  -  -  -  -  -  - 
Feature 
-  -  -  - 
-  -  -     Error 
...See Below... 
Sector Count 
-  -  -  - 
-  -  -     Sector Count 
-  -  -  -  -  -  - 
LBA Low  
-  -  -  - 
-  -  -     LBA Low  
-  -  -  -  -  -  - 
LBA Mid 
-  -  -  - 
-  -  -     LBA Mid 
-  -  -  -  -  -  - 
LBA High 
-  -  -  - 
-  -  -     LBA High 
-  -  -  -  -  -  - 
Device 
-  -  -  - 
-  -  -     Device 
-  -  -  -  -  -  - 
Command 
1  1  1  1  0  0  1  0     Status 
...See Below... 
 
Error Register 
  
Status Register 
  
CRC  UNC 
IDN 
ABT   T0N 
AM
   BSY  RDY 
DF 
DSC  DRQ   COR  IDX  ERR 
  
Table  101 Security Unlock Command (F2h)   
This  command  unlocks the  password and causes the device to enter device  unlock  mode.  If 
COMRESET with Software Setting Preservation disable or power on reset is done without executing 
the Security Disable Password command after this command is completed, the device will be in 
device lock mode. The password has not been changed yet.  
The Security Unlock command requests to transfer a single sector of data from the host including 
information specified in the following table.   
If the Identifier bit is set to master and the file is in high security mode then the password supplied 
will be compared with the stored master password. If the file is in maximum security mode then the 
security unlock will be rejected.   
If the Identifier bit is set to user, then the file compares the supplied password with the stored user 
password.   
If the password compare fails then the device returns an abort error to the host and decrements the 
unlock attempt counter. This counter is initially set to 5 and is decremented for each password 
mismatch. When this counter reaches zero then all password protected commands are rejected until 
a power off.  
Word 
D escription 
00 
Control word 
  
bit 0 
: Identifier (1-M aster, 0-User) 
  
bit 1-15  
: Reserved 
01-16 
Password 
(32 bytes) 
17-255 
Reserved 
  
Table  102 Security Unlock Information   
Identifier 
Zero indicates that device regards Password as User Password. One indicates that device 
regards Password as Master Password. 
The user can detect if the attempt to unlock the device has failed due to a mismatched password as this is the only 
reason that an abort error will be returned by the file AFTER the password information has been sent to the device. 
If an abort error is returned by the device BEFORE the password data has been sent to the file then another 
problem exists.