really?
I thought thatit is permissible to have non-R2T for the initial data out
and R2T for
remaining. i.e for a 64K transfer, the first 32K can
be the first burst size of data and
the next
32K will be solicited by the target through R2T. Am I missing
something?
<karthik>
when we are doing first 32k, we are operating in unsolicited mode. For next
32k we are operating in solicited
mode.
So we are not operating at both
the mode at the same time. For first 32k unsolicited mode we have to make sure
that InitialR2T=no and 32k = min(FirstBurstSize,Expected
DataTransferLength)
Hope this
helps
karthik
selvan
yes -
julo
|
| Dennis Young
<dyoung@rhapsodynetworks.com>
Sent by: owner-ips@ece.cmu.edu
06/12/2002 06:20 AM
Please respond to Dennis Young
|
To: ips@ece.cmu.edu
cc:
Subject: iscsi: unsolicited
data question
|
I have a question which has been asked before, but
I couldn't find a direct
answer in the archive. The table on page
200 of draft 12 doesn't directly
answer this question either.
The
first paragraph on page 36 of draft 12 says "Targets operate in either
solicitied (R2T) data mode or unsolicited (non R2T) data mode."
tells
me that a target, at all times during a data sequence transfer, can
be
one or the other, but not both (non R2T for the initial data out,
R2T for
the
remaining data). Is this
correct?
Thanks,
Dennis
---snip from an old email dated
3/30/2001---
" Hi Julian
Sorry if I'm covering old ground... Is
it possible to use unsolicited data
for the first burst and then request
any remaining data using R2T? For
example, if the target has a previously
allocated buffer available (length
defined by FirstBurstSize) for
unsolicited data, then once the initiator has
sent unsolicited data up to
and including this amount then the remaining
data (if any) can be
requested using R2T once the target has the buffer
space available.
...Matthew Burbridge Hewlett Packard, Bristol Telnet: 312 7010
E-mail:
matthewb@bri.hp.com
"
