Completing Commands in SCSI Minoport driver

NTDEV
1

hi all,
I have written a SCSI miniport driver for windows 2000 and have a
question:

Say i have 5 SRBs to complete (let’s mark them A,B,C,D and E). if I complete
E first (say by mistake) how will port driver behave??
will it assume A,B,C and D to be complete. will it send me A,B,C,D again??
Or will it assume as only E completed and will wait for notification for
other SRBs and process them normally??

Any help is higly appriciated,
thanks
ajitabh

2

In general the storage stack below the filesystem driver level does not
assume any ordering of normal IO operations. You should be able to complete
SRB E before or after any other SRB in your list. You should not however do
so “by mistake” :slight_smile:

=====================
Mark Roddy

-----Original Message-----
From: Saxena, Ajitabh Prakash [mailto:xxxxx@lsil.com]
Sent: Monday, July 21, 2003 1:19 PM
To: Windows System Software Developers Interest List
Subject: [ntdev] Completing Commands in SCSI Minoport driver

hi all,
I have written a SCSI miniport driver for windows 2000 and have a
question:

Say i have 5 SRBs to complete (let’s mark them A,B,C,D and E). if I complete
E first (say by mistake) how will port driver behave?? will it assume A,B,C
and D to be complete. will it send me A,B,C,D again?? Or will it assume as
only E completed and will wait for notification for other SRBs and process
them normally??

Any help is higly appriciated,
thanks
ajitabh

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3

There is no request ordering imposed by SCSIPORT on requests simultaneously
delivered to the miniport.
The only request ordering in SCSI is tagged/untagged request synchronization
rules, which are not violated by any ordering in the miniport.

Max

----- Original Message -----
From: “Saxena, Ajitabh Prakash”
To: “Windows System Software Developers Interest List”
Sent: Monday, July 21, 2003 9:19 PM
Subject: [ntdev] Completing Commands in SCSI Minoport driver

> hi all,
> I have written a SCSI miniport driver for windows 2000 and have a
> question:
>
> Say i have 5 SRBs to complete (let’s mark them A,B,C,D and E). if I complete
> E first (say by mistake) how will port driver behave??
> will it assume A,B,C and D to be complete. will it send me A,B,C,D again??
> Or will it assume as only E completed and will wait for notification for
> other SRBs and process them normally??
>
> Any help is higly appriciated,
> thanks
> ajitabh
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com