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the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. This bit shall not be cleared if Ultra DMA mode
5, 4, or 3 is supported or if Ultra DMA mode 5, 4, 3, or 2 is selected.
Word 2 bit 1 is cleared to disable support for Ultra DMA mode 1 and has the effect of clearing bit 1 in word 88 of
the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. This bit shall not be cleared if Ultra DMA mode
5, 4, 3, or 2 is supported or if Ultra DMA mode 5, 4, 3, 2, or 1 is selected.
Word 2 bit 0 is cleared to disable support for Ultra DMA mode 0 and has the effect of clearing bit 0 in word 88 of
the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. This bit shall not be cleared if Ultra DMA mode
5, 4, 3, 2, or 1 is supported or if Ultra DMA mode 5, 4, 3, 2, 1, or 0 is selected.
10.8.34.4.2.4 Words 3-6: Maximum LBA address
Words 3 through 6 define the maximum LBA address. This shall be the highest address accepted by the device
after execution of the command. When this value is changed, the content of IDENTIFY DEVICE words 60, 61
100, 101, 102, and103 shall be changed as described in the SET MAX ADDRESS and SET MAX ADDRESS
EXT command descriptions to reflect the maximum address set with this command. This value shall not be
changed and command aborted shall be returned if a Host Protected Area has been established by the execution
of a SET MAX ADDRESS or SET MAX ADDRESS EXT command with an address value less than that returned
by a READ NATIVE MAX ADDRESS or READ NATIVE MAX ADDRESS EXT command.. Any data contained in
the Host Protected Area is not affected.
10.8.34.4.2.5 Word 7: Command/features set supported
Word 7 bits 15:9 are reserved.
Word 7 bit 8 is cleared to disable support for the 48-bit Addressing feature set and has the effect of clearing bit
10 in words 83 and 86 and clearing the value in words 103:100 of the IDENTIFY DEVICE or IDENTIFY PACKET
DEVICE response.
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Word 7 bit 7 is cleared to disable support for the Host Protected Area feature set and has the effect of clearing bit
10 in words 82 and 85 and clearing bit 8 in words 83 and 86 of the IDENTIFY DEVICE or IDENTIFY PACKET
DEVICE response. If a Host Protected Area has been established by use of the SET MAX ADDRESS command,
these bits shall not be cleared and the device shall return command aborted.
Word 7 bit 6 is cleared to disable for the Automatic Acoustic Management feature set and has the effect of
clearing bit 9 in word 83 and word 94 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response.
Word 7 bit 5 is cleared to disable support for the READ DMA QUEUED and WRITE DMA QUEUED commands
and has the effect of clearing bit 1 in words 83 and 86 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE
response.
Word 7 bit 4 is cleared to disable support for the Power-up in Standby feature set and has the effect of clearing
bits 5 and 6 in words 83 and 86 and clearing the value in word 94 of the IDENTIFY DEVICE or IDENTIFY
PACKET DEVICE response. If Power-up in Standby has been enabled by a jumper, these bits shall not be
cleared.
Word 7 bit 3 is cleared to disable support for the Security feature set and has the effect of clearing bit 1 in words
82 and 85 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. These bits shall not be cleared if
the Security feature set has been enabled.
Word 7 bit 2 is cleared to disable support for the SMART error logging and has the effect of clearing bit 0 in
words 84 and 87 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response.
Word 7 bit 1 is cleared to disable support for the SMART self-test and has the effect of clearing bit 1 in words 84
and 87 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response.
Word 7 bit 0 is cleared to disable support for the SMART feature set and has the effect of clearing bit 0 in words
82 and 85 of the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE response. If bits 1 and 2 of word 7 are not
cleared to zero or if the SMART feature set has been enabled by use of the SMART ENABLE OPERATIONS
command, these bits shall not be cleared and the device shall return command aborted.
10.8.34.4.2.6 Words 8-254: Reserved
10.8.34.4.2.7 Word 255: Integrity word
Bits 7:0 of this word shall contain the value A5h. Bits 15:8 of this word shall contain the data structure checksum.
The data structure checksum shall be the two s complement of the sum of all byte in words 0 through 254 and
the byte consisting of bits 7:0 of word 255. Each byte shall be added with unsigned arithmetic, and overflow shall
be ignored. The sum of all bytes is zero when the checksum is correct.
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10.9 Security Mode Feature Set
The Security mode features allow the host to implement a security password system to prevent
unauthorized access to the disk drive.
" Following Commands are supported for this feature set .
" SECURITY SET PASSWORD
" SECURITY UNLOCK
" SECURITY ERASE PREPARE
" SECURITY ERASE UNIT
" SECURITY FREEZE LOCK
" SECURITY DISABLE PASSWORD
Parameter word for the Security mode feature set is described in IDENTIFY DEVICE response Word 128.
10.9.1 Security mode default setting
The drive is shipped with the master password set to 20h value (ASCII blanks) and the lock function disabled.
The system manufacturer/dealer may set a new master password by using the SECURITY SET PASSWORD
command, without enabling the lock function.
If the Master Password Revision Code feature is supported, the Master Password Revision Code is initially set
to FFFEh.
10.9.2 Initial setting of the user password
When a user password is set, the drive automatically enters lock mode by the next powered-on .
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10.9.3 Security mode operation from power-on
In locked mode, the drive rejects media access commands until a SECURITY UNLOCK command is
successfully completed.
Power-on
Locked mode
UNLOCK ERASE Media access Non-media
PREPARE access
No
Password ERASE Reject
match? UNIT Command Execute
Command
Yes
Unit erased
Unlock
mode
Lock function disabled
Normal operation, all
commands are available
FREEZE LOCK
Normal operation,
Frozen mode commands
are available
Figure 4 Password set security mode power-on flow
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10.9.4 Password lost
If the user password is lost and High level security is set, the drive does not allow the user to access any data.
However, the drive can be unlocked using the master password.
If the user password is lost and Maximum security level is set, it is impossible to access data. However, the
drive can be unlocked using the ERASE UNIT command with the master password. The drive will erase all
user data and unlock the drive.
User password lost
High
Level? UNLOCK with master password
Maximum
ERASE PREPARE Normal operation
ERASE UNIT
with master password
Normal operation
but data lost
Figure 5 User password lost
If both the user password and the master password are lost, the drive cannot be in normal operation mode.
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10.9.5 Command Table
This command table shows the drive s response to commands when the Security Function is enabled.
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