RE: Logical Block address in iSCSI CDB

[Eddy Quicksall <eddy_quicksall@ivivity.com>]

What you are asking for is usually done at a slightly higher level than the
device driver. This is very common at the caching level (at least in
embedded systems). So something like iSCSI gets it for free.

Device drivers in lower end systems (like DOS) actually did this. So, if you
are writing iSCSI for DOS, you may want to put this in your device driver.
:)

Eddy 

-----Original Message-----
From: shesha bhushan [mailto:bhushan_vadulas@hotmail.com]
Sent: Tuesday, September 03, 2002 1:13 PM
To: cdeng@iol.unh.edu; ips@ece.cmu.edu; qtao@iol.unh.edu;
rdr@iol.unh.edu
Subject: Logical Block address in iSCSI CDB


Hi,
  I established a full feature phase in ISCSI and mounted a disk from a 
remote machine. I copied a file from my local file system to the mounted 
disk. SCSI issues a series of Write commands that are encapsulated inside 
ISCSI PDUs.

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 ????

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.

Any suggestions and indeas are highly appertiated.

Thanking You
Shesha
Arizona State University.


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