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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: SCSI CDB bytesNot sure where you came up with SCSI-2. Currently iSCSI refers to the SAM-2 architecture which implies support for SCSI-3 command set. New XOR commands defined in SBC-2 use 32 byte CDBs. Most OSD commnds (Object Based Storage Device) are also > 16 bytes. Dave -----Original Message----- From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of Trang Nguyen Sent: Wednesday, July 25, 2001 5:35 PM To: IPS Subject: SCSI CDB bytes Hello, I have some questions about the SCSI CDB. From the draft-ietf-ips-iscsi-07.txt: "2.3.6 CDB - SCSI Command Descriptor Block There are 16 bytes in the CDB field to accommodate the commonly used CDB. Whenever the CDB is larger than 16 bytes, an Extended CDB AHS MUST is used to contain the CDB spillover. " 1. The SCSI CDB field in the SCSI Command PDU is 16 bytes long. Does it mean that iSCSI supports SCSI-3? I thought that iSCSI supports only SCSI-2 commands, and doesn't support SCSI-3 commands. 2. If iSCSI supports SCSI-2 commands, then in which case the CDB is larger 16 bytes? Thanks a lot, ********************************* Trang Nguyen tnguyen@perfisans.com *********************************
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