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Date: Thu, 15 Jan 2009 18:17:05 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
Message-ID: <E1LNUu1-000EXj-94@kabab.cs.huji.ac.il>
Cc: freebsd-scsi@freebsd.org
Subject: Re: ISCSI slow to read from DELL MD3000i 
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> Danny Braniss write:
> > [...]
> >   
> >>>> In this week I did many tests on ISCSI and found another problem with 
> >>>> slow writing. I created 7 virtual disk on my NAS server. The first 4 
> >>>> disks (/dev/da0 - /dev/da3) work fine, the other 3 (/dev/da4 - /dev/da6) 
> >>>> are slow.
> >>>> I found this depends from parameter ISCSI_MAX_LUNS defined in file 
> >>>> iscsi.h, set 4. I tried to increase this value, but with all values 
> >>>> higher of 4 the initiator prints error:
> >>>> iscontrol[602]: ISCSIGETCAM failed: 25
> >>>>
> >>>>         
> > arg, I will fix this in the next release, but for now, recompile iscontrol too.
> >
> > [...]
> >
> > danny
> >   
> I forgot to compile iscontrol. Sorry. 
don't be sorry, it's my fault.

>                                       Now it works fine.
> R/W speed is now ~48Mb/s on disks da0-3 and ~32Mb/s on disks da4-6. I 
> set ISCSI_MAX_LUNS at value 16. Speed 32Mb/s is good for my job, but... 
> why is there this difference?

don't know, there shouldn't be any difference, make sure they all have the same
tag opening, 

> Thanks for another reply.

thank you for testing!

danny
PS: the email I sent you before was almost correct answer to the wrong question.