Hi David:

I have created Issue#35 for this on github.

On Thursday, December 15, 2016 at 2:00:15 PM UTC-8, David C. Partridge 
wrote:
>
> You’re right, it is in section 8.2.  Maybe it needs to be said in 8.1.1 as 
> well?
>
>  
>
> Dave
>
>  
>
> *From:* open-iscsi@googlegroups.com [mailto:open-iscsi@googlegroups.com] *On 
> Behalf Of *Lee Duncan
> *Sent:* 15 December 2016 19:41
> *To:* open-iscsi@googlegroups.com
> *Subject:* Re: Problem with iSCSI connected LTO-2 tape drive
>
>  
>
> On Dec 15, 2016, at 7:14 AM, david.partri...@perdrix.co.uk wrote:
>
>  
>
> Lee,
>
> It would appear that the guilty party was:
>
> node.conn[0].timeo.noop_out_interval = 5
> node.conn[0].timeo.noop_out_timeout = 5
>
> I changed both of these to 0 for the tape device and the problem went away.
>
>  
>
> Excellent.
>
>
>
>
> Please note that the README.gz for open-scsi doesn't actually say that 
> this is what you need to do to disable the NOP-out polling, so could I 
> suggest that this be stated explicitly. 
>
>  
>
> My README says, in section 8.2:
>
>  
>
> For this setup, you can turn off iSCSI pings by setting:
>
>  
>
> node.conn[0].timeo.noop_out_interval = 0
>
> node.conn[0].timeo.noop_out_timeout = 0
>
>  
>
>
>
> I must admit that I find it hard to imagine that an iSCSI target would 
> reply to a NOP-out while it was processing a command such as a tape fsf or 
> even tape erase (whose timeout is 6 * the long-timeout of 4 hours).  Should 
> perhaps the NOP-out polling be suspended while a command is being 
> processed?  Or alternatively maybe the NOP-out polling be completely 
> disabled by default with something in the README.gz file that explains WHEN 
> you might want it and how to enable it.   It's certainly clear that (at 
> least) the MS iSCSI initiator doesn't send NOP-out polls.
>
>  
>
> open-iscsi is normally used to deal with discs. When it’s used with tape 
> it’s not unusual to find bugs or design errors that we did not know were 
> present.
>
>  
>
> Perhaps a small blurb in the README about dealing with tape, suggesting 
> turning NOOP/ping off. Please feel free to post a pull request on github or 
> suggest a patch on this list.
>
>  
>
>
>
>
> Regards
> Dave
>
>  
>
>  
>
> -- 
>
> Lee Duncan
>
>  
>
> "Choice means saying no to one thing so you can say yes to another." -- 
> Dan Millman
>
>  
>
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