Ransegnola, Lori [Lori.Ransegnola@xxxxxx] wrote:
> I sent this question last week and have not heard a thing. Do you have a suggestion of a better mailing list that I should use for this question?
>
> Thank you.
>
> Lori
>
> > -----Original Message-----
> > From: Ransegnola, Lori
> > Sent: Thursday, March 19, 2009 3:51 PM
> > To: dm-devel@xxxxxxxxxx
> > Cc: Ransegnola, Lori
> > Subject: Problem with multipathd and a blacklisted device
> >
> > Configuration:
> > --------------
> >
> > I have a multipath configuration set up where 10 disks are
> > multipathed and 2 disks are blacklisted and are not
> > multipathed. Here are the relevant parts of the multipath.conf file:
> >
> > defaults {
> > udev_dir /dev
> > polling_interval 10
> > selector "round-robin 0"
> > # path_grouping_policy multibus
> > getuid_callout "/sbin/scsi_id -g -u -s /block/%n"
> > prio_callout /bin/true
> > # path_checker readsector0
> > path_checker tur
> > rr_min_io 100
> > rr_weight priorities
> > failback immediate
> > no_path_retry fail
> > user_friendly_name yes
> > }
> >
> > blacklist {
> > # wwid 26353900f02796769
> > # devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
> > # devnode "^hd[a-z]"
> > wwid 35000c5000a41f72b
> > wwid 35000c5000a41f98b
> > devnode "^cciss!c[0-9]d[0-9]*"
> > }
> >
> >
> > The two disks that are not multipathed have udev rules and
> > are part of a software RAID set. The devices show up as
> >
> > /etc/udev/rules.d> ls -l /dev/hpdev
> > total 0
> > lrwxrwxrwx 1 root root 7 Mar 18 10:50 sda1 -> ../sda1
> > lrwxrwxrwx 1 root root 7 Mar 18 03:32 sdb1 -> ../sdb1
> >
> > /dev/md0 is created with sda and sdb. Here is the bottom of
> > the 'mdadm --detail /dev/md0' output:
> >
> > /root> mdadm --detail /dev/md0
> > /dev/md0:
> > Version
> > ...
> > Failed Devices : 0
> > Spare Devices : 0
> >
> > UUID : 94813396:a3e341fc:c5d4b8ba:0617a019
> > Events : 0.84
> >
> > Number Major Minor RaidDevice State
> > 0 8 1 0 active sync /dev/sda1
> > 1 8 17 1 active sync /dev/sdb1
> > /root>
> >
> > I am running on a Linux RHEL5 U2 system.
> > /etc/udev/rules.d> uname -a
> > Linux n0 2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:19 EDT 2007
> > x86_64 x86_64 x86_64 GNU/Linux /etc/udev/rules.d> multipath
> > -v Missing option arguement multipath-tools v0.4.7 (03/12, 2006)
> > ----------------------------
> >
> > Problem:
> >
> > This configuration works well until I do some failure testing
> > with one of the 2 blacklisted devs in the software RAID set.
> > I found that if I temporarily remove disk sda and put it back
> > a minute later the disk path, /dev/hpdev/sda1, is removed, even
> > though it is blacklisted.
What is 'multipath -ll' output before you remove the blacklisted device?
What is 'multipath -ll' output after you put the device back a minute
later?
Thanks, Malahal.
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