Okay first, I had already changed my
/etc/sysconfig/hardware/config-ccw-0.0.a200 to the way that you suggested based
on a recommendation from David Straub.
So on to the "lszfcp" commands. Before and after reboot are the same for
"lszfcp -HV" command
# lszfcp -HV
/sys/devices/css0/0.0.0006/0.0.a200
/sys/class/fc_host/host0
/sys/class/scsi_host/host0
/sys/devices/css0/0.0.0007/0.0.a300
/sys/class/fc_host/host1
/sys/class/scsi_host/host1
But the "# lszfcp -DV" command shows *nothing* after reboot and shows this
before the reboot,
# lszfcp -DV
/sys/devices/css0/0.0.0006/0.0.a200/0x50050768014035ee/0x001f000000000000
/sys/devices/css0/0.0.0006/0.0.a200/host0/rport-0:0-0/target0:0:0/0:0:0:31
/sys/block/sda /sys/class/scsi_generic/sg0
/sys/devices/css0/0.0.0007/0.0.a300/0x50050768011035ee/0x001f000000000000
/sys/devices/css0/0.0.0007/0.0.a300/host1/rport-1:0-0/target1:0:0/1:0:0:31
/sys/block/sdc /sys/class/scsi_generic/sg2
/sys/devices/css0/0.0.0006/0.0.a200/0x50050768014035ee/0x0020000000000000
/sys/devices/css0/0.0.0006/0.0.a200/host0/rport-0:0-0/target0:0:0/0:0:0:32
/sys/block/sde /sys/class/scsi_generic/sg4
/sys/devices/css0/0.0.0007/0.0.a300/0x50050768011035ee/0x0020000000000000
/sys/devices/css0/0.0.0007/0.0.a300/host1/rport-1:0-0/target1:0:0/1:0:0:32
/sys/block/sdg /sys/class/scsi_generic/sg6
/sys/devices/css0/0.0.0006/0.0.a200/0x50050768014035d9/0x001f000000000000
/sys/devices/css0/0.0.0006/0.0.a200/host0/rport-0:0-1/target0:0:1/0:0:1:31
/sys/block/sdb /sys/class/scsi_generic/sg1
/sys/devices/css0/0.0.0007/0.0.a300/0x50050768011035d9/0x001f000000000000
/sys/devices/css0/0.0.0007/0.0.a300/host1/rport-1:0-1/target1:0:1/1:0:1:31
/sys/block/sdd /sys/class/scsi_generic/sg3
/sys/devices/css0/0.0.0006/0.0.a200/0x50050768014035d9/0x0020000000000000
/sys/devices/css0/0.0.0006/0.0.a200/host0/rport-0:0-1/target0:0:1/0:0:1:32
/sys/block/sdf /sys/class/scsi_generic/sg5
/sys/devices/css0/0.0.0007/0.0.a300/0x50050768011035d9/0x0020000000000000
/sys/devices/css0/0.0.0007/0.0.a300/host1/rport-1:0-1/target1:0:1/1:0:1:32
/sys/block/sdh /sys/class/scsi_generic/sg7
Obviously, that is an issue. So what do you think that I'm missing? It still
seems that I'm missing a configuration file, maybe it's not
/etc/sysconfig/hardware/config-ccw-0.0.a200 in Debian??? I've read through
IBM's "Device Drivers, Features, and Commands" (amongst a hundred other
documents), but haven't found anything there either. It shows you how to
configure the devices (echo 0x001f000000000000 >
0.0.a200/0x50050768011035d9/unit_add) but doesn't suggest where to put those
configuration parameters to make them permanent. I'm grateful for any help that
you can provide.
-----Original Message-----
From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Steffen
Maier
Sent: Wednesday, October 06, 2010 5:15 PM
To: [email protected]
Subject: Re: Question about multipathing on zDebian (Lenny)
On 10/05/2010 07:35 PM, Wiggins, Mark wrote:
> I'm trying to
> add some multipath'd devices to a Debian(Lenny) instance. I can get
> the devices configured properly,
> I just can't get these definitions to hold across a reboot. I've
In order to narrow down which activation step does not work correctly,=20
it would be interesting to know if the following holds true after the=20
boot process finished:
- zfcp adapters for each path are online
# lszfcp -HV
- all fcp luns for each path and disk are online
# lszfcp -DV
Those would be the prerequisites to have the necessary SCSI disks for=20
device-mapper multipath to work with. After that, dm-mp might have=20
problems. However, I'm not particular familiar with that and its config=20
file (incl. blacklists/whitelists).
> My /etc/sysconfig/hardware/config-ccw-0.0.a200 looks like this,
> # Configured zfcp disks
> ZFCP_LUNS=3D"0x50050768014035ee:0x001f000000000000"
> ZFCP_LUNS=3D"0x50050768014035d9:0x001f000000000000"
> ZFCP_LUNS=3D"0x50050768014035ee:0x0020000000000000"
> ZFCP_LUNS=3D"0x50050768014035d9:0x0020000000000000"
This seems to overwrite the ZFCP_LUNS shell variable three times and the =
last one will win. So I guess only the FCP LUN 0x0020000000000000 on=20
WWPN 0x50050768014035d9 will be set online and you're missing the other=20
three LUNs (or at least the second path to the same LUN).
This looks very much like the SLES syntax and IIRC, you have to use one=20
ZFCP_LUNS variable assignment and put each WWPN:LUN pair on a separate=20
line within the same double quotes on the right hand side of the=20
assigment, i.e.:
# Configured zfcp disks
ZFCP_LUNS=3D"0x50050768014035ee:0x001f000000000000
0x50050768014035d9:0x001f000000000000
0x50050768014035ee:0x0020000000000000
0x50050768014035d9:0x0020000000000000"
You could try tracing the hwup (shell script) command to see where it fai=
ls.
# /bin/bash -x `which hwup ...`
Not sure how debain handles disks that are members of the root-fs and=20
those that are not. If the luns are not required for the root-fs you=20
might even get away without updating the initramfs and without running=20
zipl. However, it's safe to do both steps anyway.
HTH
Steffen
Linux on System z Development
IBM Deutschland Research & Development GmbH
Vorsitzender des Aufsichtsrats: Martin Jetter
Gesch=E4ftsf=FChrung: Dirk Wittkopp
Sitz der Gesellschaft: B=F6blingen
Registergericht: Amtsgericht Stuttgart, HRB 243294
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