Security Extensions - Hitachi HDS723020BLA642 Specifications

Write information data such as BIOS code within the protected area.
Change maximum LBA using Set Max Address command to 12,289,535 (BB85FFh) with nonvolatile
option.
From this point, the protected area cannot be accessed till next Set Max Address command is issued.
Any BIOSes, device drivers, or application software access the HDD as if that is the 6.2GB device
because the device acts exactly the same as real 6.2GB device does.
3. Conventional usage without system software support
Since the HDD works as 6.2GB device, there is no special care to use this device for normal use.
4. Advanced usage using protected area
The data in the protected area is accessed by following.
Issue Read Native Max Address command to get the real device maximum LBA. Returned value shows
that native device Maximum LBA is 12,692,735 (C1ACFFh) regardless of the current setting.
Make entire device be accessible including the protected area by setting device Maximum LBA as
12,692,735 (C1ACFFh) via Set Max Address command with volatile option. By using this option,
unexpected power removal or reset will not make the protected area remained accessible.
Read information data from protected area.
Issue hard reset or POR to inhibit any access to the protected area.
9.7.2

Security extensions

1. Set Max Set Password
2. Set Max Lock
3. Set Max Freeze Lock
4. Set Max Unlock.
The Set Max Set Password command allows the host to define the password to be used during the current
power on cycle. The password does not persist over a power cycle but does persist over a hardware or software
reset. This password is not related to the password used for the Security Mode Feature set. When the password
is set the device is in the Set_Max_Unlocked mode. The Set Max Lock command allows the host to disable the
Set Max commands (except set Max Unlock) until the next power cycle or the issuance and acceptance of the
Set Max Unlock command. When this command is accepted the device is in the Set_Max_Locked mode. The
Set Max Unlock command changes the device from the Set_Max_Locked mode to the Set_Max_Unlocked
mode. 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 IDENTIFY DEVICE response word 83, bit 8 indicates that this extension is supported if set, and word 86, bit
8 indicate the Set Max security extension enabled if set.
Hitachi hard disk drive specifications
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