* RHEL5 and RDAC/Multipath
@ 2007-09-24 13:39 Nuno Fernandes
2007-09-24 16:34 ` Sunil Joshi
2007-09-24 18:30 ` Chandra Seetharaman
0 siblings, 2 replies; 4+ messages in thread
From: Nuno Fernandes @ 2007-09-24 13:39 UTC (permalink / raw)
To: device-mapper development
Hi,
We've bought and IBM BladecenterH and IBM DS4700 storage.
We are using Redhat Enterprise Linux 5 and we are trying to put multipath
working.
RHEL5 we are using uses 2.6.18-8.1.3.el5xen. We've ported rdac patch
(http://kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.21/dm-mpath-rdac.patch)
to RHEL5 kernel. We've also updated multipath-tools to support
mpath_prio_rdac.
Our multipath.conf is:
devnode_blacklist {
devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
devnode "^hd[a-z]"
devnode "^cciss!c[0-9]d[0-9]*"
#USB 4G Flash drive inside HS21
devnode "sda"
}
defaults {
multipath_tool "/sbin/multipath -v0"
udev_dir /dev
polling_interval 5
default_selector "round-robin 0"
default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
#default_prio_callout "/bin/true"
failback immediate
path_checker rdac
hardware_handler "1 rdac"
prio_callout "/sbin/mpath_prio_tpc /dev/%n"
path_grouping_policy group_by_prio
}
multipaths {
multipath {
wwid 3600a0b8000320bea0000048f46e52137
alias client_data
}
}
When we start multipath -v2 it creates multipath devices. I can see 2 active
paths (active controler) and 2 ghost paths (standby controler).
When i unplug 2 active fibre that connect the fabric to DS4700, multipath
reports I/O errors and doesn't failover the controler.
Any ideas?
Thanks for any help
Nuno Fernandes
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: RHEL5 and RDAC/Multipath
2007-09-24 13:39 RHEL5 and RDAC/Multipath Nuno Fernandes
@ 2007-09-24 16:34 ` Sunil Joshi
2007-09-24 18:30 ` Chandra Seetharaman
1 sibling, 0 replies; 4+ messages in thread
From: Sunil Joshi @ 2007-09-24 16:34 UTC (permalink / raw)
To: device-mapper development
[-- Attachment #1.1: Type: text/plain, Size: 1746 bytes --]
Could you try using in your default settings
no_path_retry queue
Regards
Sunil Joshi
On 9/24/07, Nuno Fernandes <npf-mlists@eurotux.com> wrote:
>
> Hi,
>
> We've bought and IBM BladecenterH and IBM DS4700 storage.
> We are using Redhat Enterprise Linux 5 and we are trying to put multipath
> working.
>
> RHEL5 we are using uses 2.6.18-8.1.3.el5xen. We've ported rdac patch
> (
> http://kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.21/dm-mpath-rdac.patch
> )
> to RHEL5 kernel. We've also updated multipath-tools to support
> mpath_prio_rdac.
>
> Our multipath.conf is:
>
> devnode_blacklist {
> devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> devnode "^hd[a-z]"
> devnode "^cciss!c[0-9]d[0-9]*"
> #USB 4G Flash drive inside HS21
> devnode "sda"
> }
>
> defaults {
> multipath_tool "/sbin/multipath -v0"
> udev_dir /dev
> polling_interval 5
> default_selector "round-robin 0"
> default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
> #default_prio_callout "/bin/true"
> failback immediate
> path_checker rdac
> hardware_handler "1 rdac"
> prio_callout "/sbin/mpath_prio_tpc /dev/%n"
> path_grouping_policy group_by_prio
> }
>
> multipaths {
> multipath {
> wwid 3600a0b8000320bea0000048f46e52137
> alias client_data
> }
> }
>
> When we start multipath -v2 it creates multipath devices. I can see 2
> active
> paths (active controler) and 2 ghost paths (standby controler).
> When i unplug 2 active fibre that connect the fabric to DS4700, multipath
> reports I/O errors and doesn't failover the controler.
>
> Any ideas?
>
> Thanks for any help
> Nuno Fernandes
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
>
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: RHEL5 and RDAC/Multipath
2007-09-24 13:39 RHEL5 and RDAC/Multipath Nuno Fernandes
2007-09-24 16:34 ` Sunil Joshi
@ 2007-09-24 18:30 ` Chandra Seetharaman
2007-09-25 10:00 ` Nuno Fernandes
1 sibling, 1 reply; 4+ messages in thread
From: Chandra Seetharaman @ 2007-09-24 18:30 UTC (permalink / raw)
To: device-mapper development
Hi Nuno,
I would suggest you to move the rdac specific configuration information
to device section and retry.
Are you running the multipathd command ?
Here is how my rdac configuration looks in multipath.conf
--------------------------
devices {
device {
vendor "IBM"
product "1815"
hardware_handler "1 rdac"
path_checker rdac
failback immediate
path_grouping_policy group_by_prio
prio_callout "/sbin/mpath_prio_tpc /dev/%n"
}
}
-----------------------------
Let me know how it goes,
chandra
On Mon, 2007-09-24 at 14:39 +0100, Nuno Fernandes wrote:
> Hi,
>
> We've bought and IBM BladecenterH and IBM DS4700 storage.
> We are using Redhat Enterprise Linux 5 and we are trying to put multipath
> working.
>
> RHEL5 we are using uses 2.6.18-8.1.3.el5xen. We've ported rdac patch
> (http://kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.21/dm-mpath-rdac.patch)
> to RHEL5 kernel. We've also updated multipath-tools to support
> mpath_prio_rdac.
>
> Our multipath.conf is:
>
> devnode_blacklist {
> devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> devnode "^hd[a-z]"
> devnode "^cciss!c[0-9]d[0-9]*"
> #USB 4G Flash drive inside HS21
> devnode "sda"
> }
>
> defaults {
> multipath_tool "/sbin/multipath -v0"
> udev_dir /dev
> polling_interval 5
> default_selector "round-robin 0"
> default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
> #default_prio_callout "/bin/true"
> failback immediate
> path_checker rdac
> hardware_handler "1 rdac"
> prio_callout "/sbin/mpath_prio_tpc /dev/%n"
> path_grouping_policy group_by_prio
> }
>
> multipaths {
> multipath {
> wwid 3600a0b8000320bea0000048f46e52137
> alias client_data
> }
> }
>
> When we start multipath -v2 it creates multipath devices. I can see 2 active
> paths (active controler) and 2 ghost paths (standby controler).
> When i unplug 2 active fibre that connect the fabric to DS4700, multipath
> reports I/O errors and doesn't failover the controler.
>
> Any ideas?
>
> Thanks for any help
> Nuno Fernandes
>
> --
> dm-devel mailing list
> dm-devel@redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
--
----------------------------------------------------------------------
Chandra Seetharaman | Be careful what you choose....
- sekharan@us.ibm.com | .......you may get it.
----------------------------------------------------------------------
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: RHEL5 and RDAC/Multipath
2007-09-24 18:30 ` Chandra Seetharaman
@ 2007-09-25 10:00 ` Nuno Fernandes
0 siblings, 0 replies; 4+ messages in thread
From: Nuno Fernandes @ 2007-09-25 10:00 UTC (permalink / raw)
To: device-mapper development
Hi,
It's working. For IBM DS4700 i only had to change in the multipath.conf
vendor "IBM"
product "1814*"
I didn't try it but shouln't be using prio_callout /sbin/mpath_prio_rdac??
Thanks
Nuno Fernandes
On Monday 24 September 2007 19:30:31 Chandra Seetharaman wrote:
> Hi Nuno,
>
> I would suggest you to move the rdac specific configuration information
> to device section and retry.
>
> Are you running the multipathd command ?
>
> Here is how my rdac configuration looks in multipath.conf
> --------------------------
> devices {
> device {
> vendor "IBM"
> product "1815"
> hardware_handler "1 rdac"
> path_checker rdac
> failback immediate
> path_grouping_policy group_by_prio
> prio_callout "/sbin/mpath_prio_tpc /dev/%n"
> }
> }
> -----------------------------
> Let me know how it goes,
>
> chandra
>
> On Mon, 2007-09-24 at 14:39 +0100, Nuno Fernandes wrote:
> > Hi,
> >
> > We've bought and IBM BladecenterH and IBM DS4700 storage.
> > We are using Redhat Enterprise Linux 5 and we are trying to put multipath
> > working.
> >
> > RHEL5 we are using uses 2.6.18-8.1.3.el5xen. We've ported rdac patch
> > (http://kernel.org/pub/linux/kernel/people/agk/patches/2.6/2.6.21/dm-mpat
> >h-rdac.patch) to RHEL5 kernel. We've also updated multipath-tools to
> > support
> > mpath_prio_rdac.
> >
> > Our multipath.conf is:
> >
> > devnode_blacklist {
> > devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> > devnode "^hd[a-z]"
> > devnode "^cciss!c[0-9]d[0-9]*"
> > #USB 4G Flash drive inside HS21
> > devnode "sda"
> > }
> >
> > defaults {
> > multipath_tool "/sbin/multipath -v0"
> > udev_dir /dev
> > polling_interval 5
> > default_selector "round-robin 0"
> > default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
> > #default_prio_callout "/bin/true"
> > failback immediate
> > path_checker rdac
> > hardware_handler "1 rdac"
> > prio_callout "/sbin/mpath_prio_tpc /dev/%n"
> > path_grouping_policy group_by_prio
> > }
> >
> > multipaths {
> > multipath {
> > wwid 3600a0b8000320bea0000048f46e52137
> > alias client_data
> > }
> > }
> >
> > When we start multipath -v2 it creates multipath devices. I can see 2
> > active paths (active controler) and 2 ghost paths (standby controler).
> > When i unplug 2 active fibre that connect the fabric to DS4700, multipath
> > reports I/O errors and doesn't failover the controler.
> >
> > Any ideas?
> >
> > Thanks for any help
> > Nuno Fernandes
> >
> > --
> > dm-devel mailing list
> > dm-devel@redhat.com
> > https://www.redhat.com/mailman/listinfo/dm-devel
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-09-25 10:00 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2007-09-24 13:39 RHEL5 and RDAC/Multipath Nuno Fernandes
2007-09-24 16:34 ` Sunil Joshi
2007-09-24 18:30 ` Chandra Seetharaman
2007-09-25 10:00 ` Nuno Fernandes
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