T13/e06140r0
DCO and ATA Security Clarifications
Proposed change to the Security Mode feature set clarification proposal (to be discussed on the
conference call today (06/14/06… see www.t13.org for call details) :
-----------------------Change Table 4 to list out the individual DCO commands:
Security Table 4 change
Device Configuration (ATA-8)
SEC1 –
Disabled
SEC4 –
Locked
SEC5 –
Unlocked
Executable
Aborted
Executable
SEC2 / SEC6
Disabled
Frozen
Executable
Executable
Executable
Executable
Executable
Aborted
Aborted
Aborted
Aborted
Executable
Executable
Executable
Executable
Executable
Executable
Aborted
Aborted
Replace with:
DCO Freeze Lock
DCO Identify
DCO Restore
DCO Set
Blue text: New for ATA-8, not covered in ATA-7
Yellow highlight: Not currently covered
Change the text for section 1.3 to be as follows:
The state of DCO ( Frozen or UnFrozen ) shall have no effect on the disposition of security
commands.
If DCO successfully disables support for the Security feature set (DCO Word 7, bit 3 cleared to
zero), the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command shall respond as follows:
clear word 82 bit 1 to zero, clear word 85 bit 1 to zero, clear words 89, 90, 92 and 128 to zero.
If DCO successfully enables support for the Security feature set (DCO Word 7, bit 3 set to one),
the IDENTIFY DEVICE or IDENTIFY PACKET DEVICE command shall respond as follows: set
word 82 bit 1 to one; clear word 85 bit 1 to zero; set word 128 bit 0 to one; set word 128 bit 5 to
one if enhanced security erase is supported and set words 89, 90 and 92 to valid values.
HP/Jeff Wolford
June 14, 2006
Page 1 of 1