Re: iSCSI: DataRN

[Santosh Rao <santoshr@cup.hp.com>]

Julian,

The iSCSI draft should refrain from advocating any retry policies at the
iSCSI layer, such as being currently done for connection failures and
digest errors.

I/O retry policies are decided by the SCSI ULP based on the class of the
target. (disk, tape, changer, etc).
For a tape class of device, the SCSI ULP may not wish to retry on an error
[without a prior rewind operation]. In such situations, iSCSI attempting to
retry on connection failures or digest errors can result in problems with
sequential access type of media.

Regards,
Santosh

julian_satran@il.ibm.com wrote:

> Yes - command restart will have to be just that ... restart.
>
> Julo
>
> Raghavendra Rao <jp.raghavendra@sun.com> on 19/01/2001 18:41:47
>
> Please respond to Raghavendra Rao <jp.raghavendra@sun.com>
>
> To:   ips@ece.cmu.edu
> cc:
> Subject:  iSCSI: DataRN
>
> Julian,
>
> > The consesus at the intermediate meeting in Orlando was to drop Data
> > Numbering.
> > If you have strong object here is your last chance to object.
> >
>
> I support the removal of DataRNs. I assume that this will also result in
> the elimination of the concept of micro-level restart of data transfer
> after
> a connection failover with in a session ? Or is that still present ?
>
> Thanks.
>
> -JP
begin:vcard 
n:Rao;Santosh 
tel;work:408-447-3751
x-mozilla-html:FALSE
org:Hewlett Packard, Cupertino.;SISL
adr:;;19420, Homestead Road, M\S 43LN,	;Cupertino.;CA.;95014.;USA.
version:2.1
email;internet:santoshr@cup.hp.com
title:Software Design Engineer
x-mozilla-cpt:;21088
fn:Santosh Rao
end:vcard