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I don't see a spec value for the CDB length in the ATA/ATAPI-6 spec, so it doesn't explicitly allow or disallow sizes other than 12 bytes. Note that the SFF 8020r26 document states specifically that the CDB is 12 bytes (6 words). MKE. -----Original Message----- From: Pat LaVarre [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 24, 2002 8:39 AM To: [EMAIL PROTECTED] Subject: [t13] April 23 - Atapi Cdb lengths This message is from the T13 list server. > [t13] Minutes of the April 23 plenary meeting > From: Mclean, Pete [mailto:[EMAIL PROTECTED]] > Sent: Wed 4/24/2002 8:42 AM ... > 7.5.8 Reserved op-codes for serial ATA (e01145r1) [McLean] > ... > Curtis Stevens asked about using > the current ATAPI command for this capability. > Hale Landis noted that current ATAPI only allows > for 12 byte CDB's. > Several people expressed that > this would be a big modification to the document > and it was more than just a pass through. > Tony Goodfellow suggested > that using ATAPI could allow for any size CDB. Eh? I thought ... T13 Atapi says in the first few "word"s of op xA1 IdentifyPacketDevice data whether the host should always copy Out a 12 or 16 byte "packet" at BSY DRQ C/D I/O = 0 1 command out time. T13 has no other comment on how long the Cdb is, except that by implication it can't be longer than 16 bytes. No? Thanks in advance, Pat LaVarre
