IBM DJSA-210 Hard Drive Specifications - Page 104

Set Max Inactive, Set Max Unlocked, Set Max Frozen, Set Max SET PASSWORD, Set Max FREEZE LOCK

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This command requests a transfer of a single sector of data from the host. The figure shown above defines the content of this sector of information. The password supplied in the sector of data transferred is compared with the stored Set Max password. If the password compare fails, then the device returns command aborted and decrements the unlock counter. On the acceptance of the Set Max LOCK command, this counter is set to a value of five and is decremented for each password mismatch when Set Max UNLOCK is issued and the device is locked. When this counter reaches zero, then the Set Max UNLOCK command returns command aborted until a power cycle. The Set Max FREEZE LOCK command allows the host to disable the SET MAX commands (including Set Max UNLOCK) until the next power cycle. When this command is accepted the device is in the Set Max Frozen mode. The Set Max password, the Set Max security mode and the unlock counter don't persist over a power cycle but persist over a hardware or software reset. NOTE: If this command is immediately preceded by a Read Native MAX ADDRESS command regardless of Feature register value, it shall be interpreted as a Set Max ADDRESS command. Set Max Frozen Set Max Locked Set Max FREEZE LOCK Set Max Unlocked Set Max LOCK Set Max UNLOCK Set Max Inactive Set Max SET PASSWORD Figure 66. Set Max security mode transition Travelstar 32GH/30GT/20GN hard disk drive specifications 90

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This command requests a transfer of a single sector of data from the host. The figure shown above
defines the content of this sector of information. The password supplied in the sector of data transferred is
compared with the stored Set Max password. If the password compare fails, then the device returns
command aborted and decrements the unlock counter. On the acceptance of the Set Max LOCK
command, this counter is set to a value of five and is decremented for each password mismatch when Set
Max UNLOCK is issued and the device is locked. When this counter reaches zero, then the Set Max
UNLOCK command returns command aborted until a power cycle.
The Set Max FREEZE LOCK command allows the host to disable the SET MAX commands (including Set
Max UNLOCK) until the next power cycle. When this command is accepted the device is in the Set Max
Frozen mode.
The Set Max password, the Set Max security mode and the unlock counter don't persist over a power
cycle but persist over a hardware or software reset.
NOTE: If this command is immediately preceded by a Read Native MAX ADDRESS command
regardless
of Feature register value, it shall be interpreted as a Set Max ADDRESS command.
Set Max Inactive
Set Max SET PASSWORD
Set Max UNLOCK
Set Max Unlocked
Set
Max
LOCK
Set Max Locked
Set Max FREEZE LOCK
Set Max Frozen
Figure 66.
Set Max security mode transition
Travelstar 32GH/30GT/20GN hard disk drive specifications
90