I ran into this confusion earlier this week.  I think my interpretation matches yours.  I believe the bit in Word 85 is the actual device enable bit for SET FEATURES, and the bit in Word 128 is related to the current device state.  I think this may be the same expectations on the “support” bits as there are two of those also.

 

Regards,

Brian Dees

Intel Corporation

Storage Initiatives Engineer

503-712-7761


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Curtis Stevens
Sent: Friday, August 19, 2005 11:31 AM
To: [email protected]
Subject: [t13] Another Question to talk about next week

 

In reading ATA/ATAPI-7 there are 2 sets of security enabled bits, on in word 85 bit 1 and another in word 128 bit 1.  I also noted that there are redundant implemented bits as well, but that is not my question…

 

There is nothing in these bits that denotes what Security Enabled means.  I believe that some of the bits in word 128 are actually referring to states in the security state transition diagrams.  Its just not clear… 

 

 

-------------------------------------------------

Curtis E. Stevens

20511 Lake Forest Drive #C-214D

Lake Forest, California 92630

Phone: 949-672-7933

Cell: 949-307-5050

E-Mail: [EMAIL PROTECTED]

Ambition is a poor excuse for not having enough sense to be lazy.

 

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