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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: Another shot at codes and please commentJulian, What is the state of this change? Is this going to be in draft 7, or is it in draft 6? Thanks, Venkat Rangan Rhapsody Networks Inc. http://www.rhapsodynetworks.com -----Original Message----- From: julian_satran@il.ibm.com [mailto:julian_satran@il.ibm.com] Sent: Tuesday, May 01, 2001 6:50 AM To: ips@ece.cmu.edu Subject: Another shot at codes and please comment Here is a another version of the opcodes part: 1.1.1.1 Opcode The Opcode indicates what type of iSCSI PDU the header encapsulates. The Opcodes are divided into two categories: initiator opcodes and target opcodes. Initiator opcodes are in PDUs sent by the initiators (request PDUs), and target opcodes are in PDUs sent by the target (response PDUs). Initiators MUST NOT use target opcodes and targets MUST NOT use initiator opcodes. Valid initiator opcodes defined in this specification are: 0x00 NOP-Out (from initiator to target) 0x01 SCSI Command (encapsulates a SCSI Command Descriptor Block) 0x02 SCSI Task Management Command 0x03 Login Command 0x04 Text Command 0x05 SCSI Data-out (for WRITE operations) 0x06 Logout Command 0x10 SNACK Request Valid target opcodes are: 0x20 NOP-In (from target to initiator) 0x21 SCSI Response (contains SCSI status and possibly sense information or other response information) 0x22 SCSI Task Management Response 0x23 Login Response 0x24 Text Response 0x25 SCSI Data-in (for READ operations) 0x26 Logout Response 0x31 Ready To Transfer (R2T - sent by target to initiator when it is ready to receive data from initiator) 0x32 Asynchronous Message (sent by target to initiator to indicate certain special conditions) 0x3f Reject Initiator opcodes 0x1c-0x1e and target opcodes 0x3c-0x3e are vendor specific codes. Please comment, Julo
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