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Ok... Then I propose we make the Identify Packet command consistent with
Download Microcode command and require Word 83/86 Bit 0 to be 0.
SO my current understanding is then besides the Device Reset command, Identify
Packet Command, and Packet command, all other commands for ATAPI devices come
from the SCSI / MMC group.
(notice I said commands, not protocols... PIO / DMA, SRST, Status, Error reg,
etc)
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
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]
> Sent: Thursday, December 02, 2004 6:34 PM
> To: Wolford, Jeff
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: Re: [t13] ATA-7 Conflict: Download Microcode for ATAPI drives
>
>
>
>
>
> The answer to this is why LOTS of ATA stuff are 'prohibited'
> for ATAPI - -
> -
>
> If SCSI/ATAPI has a way to do it, then it should be done via ATAPI.
>
> 'download microcode' is normally done in SCSI via the SCSI
> 'write buffer'
> cmd
> (note: NOT the ATA 'write buffer' cmd)
>
> therefore: ATA 'download microcode' is prohibited for packet devices.
>
> Thank You !!!
> -----------------------------------------------------------------
> Jim Hatfield
> ATA Interface Firmware & T13 (ATA/ATAPI) Standards
> Representative Seagate Technology LLC
> e-mail: [EMAIL PROTECTED]
> s-mail: 389 Disc Drive; Longmont, CO 80503 USA
> voice: 720-684-2120
> fax....: 720-684-2711
> ====================================================
>
>
>
>
> "Wolford, Jeff"
>
> <[EMAIL PROTECTED]
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> com>
> To
> Sent by: <[EMAIL PROTECTED]>
>
> [EMAIL PROTECTED]
> cc
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> Subject
> Available [t13] ATA-7 Conflict:
> Download
> Microcode for ATAPI
> drives
>
>
> 12/02/2004 05:18
>
> PM
>
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> 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
>
>
>
>
