INTERFACE COMMANDS
7 – 7
Read Native Max Address
Read Native Max Address
Read Native Max Address
Read Native Max Address
Read Native Max Address
This command returns the native maximum address. The native maximum address is the highest address
accepted by the drive in the factory default condition. The native maximum address is the maximum address
that is valid when using the SET MAX ADDRESS command.
Set Max
Set Max
Set Max
Set Max
Set Max
Individual SET MAX commands are identified by the value placed in the Features register. After successful
command completion, all read and write access attempts to addresses greater than specified by the successful
SET MAX ADDRESS command are rejected with an IDNF error. IDENTIFY DEVICE response words 1,
54, 57, 60 and 71 will reflect the maximum address set with this command.
VAL UE
C OMMAN D
00 h
obsolete
01 h
Set Ma x Set Passwo rd
02 h
Set Max Lo ck
03 h
Set Ma x Unlo ck
04 h
Set Ma x F reeze Lo ck
05h-F Fh
re served
Set Max Password
Set Max Password
Set Max Password
Set Max Password
Set Max Password
This sub-command requests a transfer of a single sector of data from the host. The password is retained by
the drive until the next power cycle.
Set Max Lock
Set Max Lock
Set Max Lock
Set Max Lock
Set Max Lock
After this sub-command is completed any other SET MAX commands except SET MAX UNLOCK and
SET MAX FREEZE LOCK are rejected. The drive remains in this state until a power cycle or the
acceptance of a SET MAX UNLOCK or SET MAX FREEZE LOCK command.
Set Max Unlock
Set Max Unlock
Set Max Unlock
Set Max Unlock
Set Max Unlock
This sub-command requests a transfer of a single sector of data from the host. The password supplied in the
sector of data transferred will be compared with the stored SET MAX password.
If the password compare fails, then the drive 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 will be
decremented for each password mismatch when SET MAX UNLOCK is issued and the drive is locked.
When this counter reaches zero, then the SET MAX UNLOCK command will return command aborted
until a power cycle.
If the password compare matches, then the drive will make a transition to the Set_Max_Unlocked state and
all SET MAX commands will be accepted.
Set Max Freeze Lock
Set Max Freeze Lock
Set Max Freeze Lock
Set Max Freeze Lock
Set Max Freeze Lock
After sub-command completion any subsequent SET MAX commands are rejected. Commands disabled by
SET MAX FREEZE LOCK are:
Set Max Address
Set Max Set Password
Set Max Lock
Set Max Unlock
