AW: AW: only 8 LUNs on MPT

[Kenneth D. Merry]

On Fri, Mar 07, 2008 at 08:55:36 -0700, Scott Long wrote:
> d_elbracht wrote:
> >the tunable is set:
> >sysctl -a | grep kern.cam.cam_srch
> >kern.cam.cam_srch_hi: 1
> >
> >here is the output from 'camcontrol inq da45':
> >
> >pass45: <IFT S16S-G1030 361F> Fixed Direct Access SCSI-4 device
> >pass45: Serial Number 01F53A00000000472CF136000000
> >300.000MB/s transfers , Command Queueing Enabled 
> >
> >Dieter
> >
> 
> What version of FreeBSD is this?  The max lun benhavior changed a
> bit in the SCSI layer a couple of years ago.  The MPT driver itself
> supports up to 256 LUNs.

I think the problem may be:

                cpi->max_lun = 7;

That's from line 3590 in rev 1.63 of mpt_cam.c.  (i.e. -current)

I ran into the same problem a few days ago in RELENG_7, but hadn't gotten
around to sending email about it yet.

The symptom I was having is all the LUNs on the target wouldn't probe
automatically.  I could rescan them manually, but CAM would stop probing at
7.

I fixed it by setting max_lun to 1024.  (Not sure if anything would break
if I actually got that high, but my target was only setup for 79 LUNs.)

Ken
-- 
Kenneth Merry
ken at kdm.org