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Figure 13 Password Lost
12.9.1.4 Attempt limit for SECURITY UNLOCK command
The SECURITY UNLOCK command has an attempt limit. The purpose of this attempt limit is to
prevent that someone attempts to unlock the drive by using various passwords many times.
The device counts the password mismatch. If the password does not match, the device counts it up
without distinguishing the Master password and the User password. If the count reaches 5, EXPIRE
bit(bit 4) of Word 128 in Identify Device information is set, and then SECURITY ERASE UNIT
command and SECURITY UNLOCK command are aborted until a power off. The count and EXPIRE
bit are cleared after a power on reset.
Command Table
12.9.6
This table shows the device's response to commands when the Security Mode Feature Set (Device
lock function) is enabled.
Check Power Mode
Device Configuration RESTORE
Device Configuration FREEZE LOCK
Device Configuration IDENTIFY
Device Configuration SET
Execute Device Diagnostic
Flush Cache
Flush Cache Ext
Format Track
Format Unit
Identify Device
Idle
Idle Immediate
Initialize Device Parameters
Read Buffer
Read DMA
Read DMA Ext
Travelstar 5K160 (SATA) Hard Disk Drive Specification
Command
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Device
Device
Device
Locked
Unlock
Frozen
Mode
Mode
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o
o
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o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
o
o
x
o
o
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