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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: Logical Block address in iSCSI CDB> My doubt is.... Do the logical block address contained in > SCSI CDB inside ISCSI PDUs are actual address of the remote disk. > Can we change that ???? Yes and no in that order. > What I am trying to do is,....... > > If SCSI sends only 2 block or 3 blocks, wait and collect data upto 16 > blocks (Usual max PDU of ISCSI) and send them over the network so that it > will reduce the header over-head. That sort of thing is usually called a proxy. Proxies can do anything they want, but have to take full responsibility for the results (e.g., if multiple SCSI operations have been combined into a single iSCSI operation, when the iSCSI response comes back, it has to be split into the individual responses that SCSI expects to its individual operations. iSCSI (like SCSI) generally does not support scatter-gather over the wire - the blocks in an individual read or write operation generally have to be contiguous. Thanks, --David --------------------------------------------------- David L. Black, Senior Technologist EMC Corporation, 42 South St., Hopkinton, MA 01748 +1 (508) 249-6449 FAX: +1 (508) 497-8018 black_david@emc.com Mobile: +1 (978) 394-7754 ---------------------------------------------------
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