SORT BY:

LIST ORDER
THREAD
AUTHOR
SUBJECT


SEARCH

IPS HOME


    [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

    RE: SCSI CDB bytes



    Not 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
    *********************************
    
    
    

    • References:


Home

Last updated: Tue Sep 04 01:04:12 2001
6315 messages in chronological order