RE: SCSI command order issue

[Eddy Quicksall <Eddy_Quicksall@ivivity.com>]

Every operating system will deal with this. It is the nature of
multi-threaded disk access. It is a ULP issue and there are lots of ways
that the OS's handle it.

iSCSI and SCSI are no different in this respect.

Eddy

-----Original Message-----
From: Wang Yong Hong, Wilson [mailto:dsiyhw@dsi.nus.edu.sg]
Sent: Sunday, February 24, 2002 6:54 AM
To: ips@ece.cmu.edu
Subject: SCSI command order issue 

Hello,

Here I ask one question about SCSI protocol.

I traced the linux kernel source code about SCSI module.

In SCSI module, every SCSI command block is assigned
one unique serial number. However this number is only
valid before the block is returned to the SCSI middle layer.

There is no mechanism of sequence control for SCSI.
What is your opinion about the SCSI block out of order
when they return to upper layer ? What do your people
think about this ?

Thanks

Wilson