RE: [t13] ATA-7 Conflict: Download Microcode for ATAPI drives

[Curtis Stevens]

Title: ATA-7 Conflict: Download Microcode for ATAPI drives

Jeff               I would expand your question further and ask why any ATA command is prohibited for an ATAPI device??  I think at some point back around 1995 some CD-ROM vendors were concerned that they would be asked to implement ATA read and write commands.  I do not think this is an issue today and I would like to remove the prohibitions from ATA-8...               Now, getting to your question, I think the assumption is that ATAPI devices would use the SCSI download microcode capabilities.     ------------------------------------------------ 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] My friends and I were on a beer run and noticed that the cases were discounted 10%. Since it was a big party, we bought two cases. The cashier multiplied two times 10% and gave us a 20% discount...     and then he voted   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Wolford, Jeff Sent: Thursday, December 02, 2004 4:18 PM To: [EMAIL PROTECTED] Subject: [t13] ATA-7 Conflict: Download Microcode for ATAPI drives   I have found a conflict in the ATA-7 specification: In the Identify Packet Device, its lists Word 83, bit 0 as indicating Download Microcode command support However: Under the Download Microcode command (Sec 6.11) it says the use is "Prohibited" for packet command devices. So if it is prohibited then an ATAPI device is required to clear Word 83 (and Word 86) bit 0 to 0, and the Identify Packet Device should indicate such. QUESTION: Why is the download microcode command prohibited for ATAPI devices ? Why don't we want them to use the same OP code ? Jeff Jeff Wolford                       Email: [EMAIL PROTECTED] Master Architect Storage Interface and Tools - Business PC Group     Voice: (281) 514-9465,     Pager: (800) 973-5739 Hewlett-Packard Corporation