RE: gfs 5.1, rh 7.3, qlogic 2200, and a brocade

Just some follow-up...

Some storage subsystems insist on having and/or starting at LUN 0, even
though their is no such requirement in the SCSI standards (SAM-2).  Others
do not.

Also, some subsystems require a complete 0..N LUN scheme, i.e. if LUN N
exists, all LUNs 0..N-1 must also exist.  Once again, this is a non-standard
but is (all too) typical of proprietary controllers.

Rob

-----Original Message-----
From: Jordi Floriach [mailto:[email protected]]
Sent: Wednesday, July 24, 2002 3:55 AM
To: [email protected]
Cc: Xavier Arandes; Jordi Herrero; Santi Casas
Subject: RE: [gfs-users] gfs 5.1, rh 7.3, qlogic 2200, and a brocade


Hi

I've experienced the same problem with SuSE 7.3 and RH 7.3 with my qla2200
connecting to a Compaq HGS80.
At qlogic web site I found SANsurfer, an HBA administration software from
which I can see my LUNs. This tells me that HSG80 and qla2200 are working
well. But, cat /proc/partitions does not show the logical units and
/var/log/messages only shows that qla2200 has discovered the HSG80
controller (LUN 0) but not the other LUNs.
Just yesterday I discovered where the error is: at SCSI support module. It
seems like each LUN discovered tells the kernel wether it needs to continue
looking for LUNs or not. For any reason, the HSG80 controller says that no
more LUNs need to be discovered.
I've hacked the SCSI support module in this way:
Edit file /usr/src/linux/drivers/scsi/scsi_scan.c
Search the 'break' in function scan_scsis
Comment it.
Recompile the kernel as usual

Other issues:
Same hardware with RH 7.0, I see the LUNs.
HSG80 + HBA Emulex + SuSE 7.3, I see the LUNs without hacking.

I hope this helps (I'm a little sure this will help you)
good luck


Jordi Floriach


-----Mensaje original-----
De: brown wrap [mailto:[email protected]]
Enviado el: martes, 23 de julio de 2002 23:16
Para: Richard Gass; '[email protected]'
Asunto: RE: [gfs-users] gfs 5.1, rh 7.3, qlogic 2200, and a brocade


oh, i haven't even gotten that far. i mean when i do a
cat /proc/partitions, only the internal drive shows
up.

--- Richard Gass <[email protected]> wrote:
> Also remember that each logical device on the SAN
> must be mapped with a
> starting lun of 0.  I had this problem with my
> hitachi san config.
> 
> > -----Original Message-----
> > From: Alan Willis [mailto:[email protected]]
> > Sent: Tuesday, July 23, 2002 7:05 AM
> > To: [email protected]
> > Cc: [email protected]
> > Subject: Re: [gfs-users] gfs 5.1, rh 7.3, qlogic
> 2200, and a brocade
> > 
> > 
> > 
> > 	One more thing.  What kind of RAID box are you
> using?  
> > We have two DotHill SANnet 7128's
> > and sometimes people forget to map the partitions
> to the 
> > proper host channels.
> > 
> > Might want to check out how your array is
> configured.
> > 
> > Hope it helps,
> > -alan
> > 
> > On Tue, 23 Jul 2002 07:01:29 -0700
> > Alan Willis <[email protected]> wrote:
> > 
> > > I have a similar setup, using RH 7.2 and
> GFS-5.01 and the 
> > qla2200 driver from redhat.
> > > Try booting your kernel with the
> max_scsi_luns=128 option.
> > > 
> > > -alan
> > > 
> > > On Tue, 23 Jul 2002 13:08:43 -0700 (PDT)
> > > brown wrap <[email protected]> wrote:
> > > 
> > > > 
> > > > 
> > > > does anyone have this setup? i can't get off
> the
> > > > ground. i've installed rh 7.3 and gfs 5.1, but
> again i
> > > > am having trouble seeing my raid. the last
> time i
> > > > experienced problems, it was 5.0.1 and it was
> seeing
> > > > just one partition. this time i am not seeing
> > > > anything. now i have three nodes. one i did
> not
> > > > ugrade, so its still at rh 7.2 with gfs 5.0.1
> and it
> > > > does in fact see
> > > > the two partitions of the raid.
> > > > 
> > > > greg
> > > > 
> > > > =====
> > > > Sixty miles, three days, one mission.
> > > > 
> > > > http://brownwrap.pledgepage.com
> > > > 
> > > >
>
http://homepage.bethepeople.com/display/mp_page.php?page_id=53
> > > > 
> > > >
> __________________________________________________
> > > > Do You Yahoo!?
> > > > Yahoo! Health - Feel better, live better
> > > > http://health.yahoo.com
> > > > 
> > > >
> _______________________________________________
> > > > gfs-users mailing list
> > > > [email protected]
> > > >
> http://lists.sistina.com/mailman/listinfo/gfs-users
> > > > Read the GFS Howto: 
> http://www.sistina.com/gfs/Pages/howto.html
> > > > 
> > > 
> > > _______________________________________________
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> > >
> http://lists.sistina.com/mailman/listinfo/gfs-users
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> > > 
> > 
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> > 
> 
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=====
Sixty miles, three days, one mission.

http://brownwrap.pledgepage.com

http://homepage.bethepeople.com/display/mp_page.php?page_id=53

__________________________________________________
Do You Yahoo!?
Yahoo! Health - Feel better, live better
http://health.yahoo.com

_______________________________________________
gfs-users mailing list
[email protected]
http://lists.sistina.com/mailman/listinfo/gfs-users
Read the GFS Howto:  http://www.sistina.com/gfs/Pages/howto.html

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