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Jim, Thanks for the comments. I do believe, however, that now we indeed have a good one on the table for next week. I am not suggesting removing, obsoleting, or redefining any of the aforementioned bits. Just asking that we include appropriate clarification. I understand your comment that W128/b0,b1 are to be copies of W82/b1 and W85/b1, respectively. However, I have a problem with the determinism of the second statement, i.e., if a drive comes up with W82/b1=1 AND W85/b1=0, you can never issue SECURITY SET PASSWORD or SECURITY DISABLE PASSWORD (they are part of the Security Mode feature set). So a possible clarification would be to say that at power-up, if W82/b1=1 Word 85 bit 1 must be 1, but that's a required behavior (???) Thoughts? Mladen Luksic Western Digital -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, August 19, 2005 2:35 PM To: Mladen Luksic Cc: [email protected]; [EMAIL PROTECTED] Subject: RE: [t13] Another Question to talk about next week I think we should be VERY CAUTIOUS about talking about removing or obsoleting or redefining ANY of these bits. ----------------------------------- (word 128, bit 0) was intended to be a copy of (word 82, bit 1) (word 128, bit 1) was intended to be a copy of (word 85, bit 1) Why ? so that a BIOS (for example) can look IN ONE PLACE to find the full security status. ----------------------------------- The manner in which word 85, bit 1 is set/cleared is well documented (ref: ATA8-ACS, rev 1f, IDENTIFY DEVICE, page 92 (print) / page 110 (pdf): If bit 1 of word 85 is set to one, the Security Mode feature set has been enabled via the SECURITY SET PASSWORD command. If bit 1 of word 85 is cleared to zero, the Security Mode feature set has been disabled via the SECURITY DISABLE PASSWORD command. ----------------------------------- On the other hand, it WOULD be nice if the SECURITY SET PASSWORD and SECURITY DISABLE PASSWORD commands mentioned that they have these 'side effects' in IDENTIFY DEVICE. Thank You !!! ----------------------------------------------------------------- Jim Hatfield Seagate Technology LLC e-mail: [EMAIL PROTECTED] s-mail: 389 Disc Drive; Longmont, CO 80503 USA voice: 720-684-2120 fax....: 720-684-2711 ========================================== "Mladen Luksic" <[EMAIL PROTECTED] c.com> To Sent by: <[email protected]> [EMAIL PROTECTED] cc rg No Phone Info Subject Available RE: [t13] Another Question to talk about next week 08/19/2005 02:48 PM A suggestion was made that W128/b1 may refer to the states in the security state transition diagram. If so, W85/b1 and W128/b1 are not redundant in that they may indeed have different values (W128/b1 changing as a result of executing various SECURITY commands). However, W82/b0 and W128/b0 must mean the same (the support for the Security Mode feature set), so they are indeed redundant. But what is still missing is what changes W85/b1. SET FEATURES? How? And even if so, assuming that W82/b1=1 AND W128/b0=1, then W85/b1=0 AND W128/b1=1 should be illegal. Thoughts? Mladen Luksic Western Digital 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.
