[dm-devel] oblem with lvm and multipath on fedora 13
Malahal Naineni
malahal at us.ibm.com
Sun Aug 29 18:39:43 UTC 2010
> [root at testfs boot]# mkdir foo
> [root at testfs boot]# cd foo
> [root at testfs foo]# zcat ../initramfs-with-multipath.img | cpio -icd
> 26392 blocks
> [root at testfs foo]# ls
> bin emergency initqueue-finished mount proc tmp
> cmdline etc initqueue-settled pre-pivot sbin usr
> dev init lib pre-trigger sys var
> dracut-005-3.fc13 initqueue lib64 pre-udev sysroot
> [root at testfs foo]# find . -print | grep -i multi
> ./lib/modules/2.6.33.8-149.fc13.x86_64/kernel/drivers/md/dm-multipath.ko
The dm-multipath.ko kernel module is present. It needs multipath command
calling from an initrd script (/init ???)
> /dev/sdq: UUID="2VqqWi-cWZo-Tu5T-cC40-z4CW-ZOti-aWhi5F" TYPE="LVM2_member"
> /dev/sdr: UUID="JV8nOF-NxdU-WAZP-ZY9h-iXo8-HJWs-CjSjTj" TYPE="LVM2_member"
> /dev/sds: UUID="Crn275-rSvZ-6Bl1-LplP-c0iG-PvtZ-OVofd8" TYPE="LVM2_member"
> /dev/sdc: UUID="2VqqWi-cWZo-Tu5T-cC40-z4CW-ZOti-aWhi5F" TYPE="LVM2_member"
> /dev/sdd: UUID="JV8nOF-NxdU-WAZP-ZY9h-iXo8-HJWs-CjSjTj" TYPE="LVM2_member"
> /dev/sde: UUID="Crn275-rSvZ-6Bl1-LplP-c0iG-PvtZ-OVofd8" TYPE="LVM2_member"
The above drives are added to LVM without any partitions. Everything
else has partitions, so you need to run "kpartx" on each multipath
device to create mappings for partitions. Did you enable multipathd
service (I thought it should call kpartx or maybe a udev rule)?
I saw device mapper reload ioctl failures when you enabled the VGs. The
LVM scan seems to use single paths rather than multipath devices (from
duplicate PV messages).
So run "kpartx -a /dev/mapper/<yourmultipathdevice>" on each multipath
device and then run LVM scan.
If LVM still uses paths and complains about duplicate PVs, then you may
need create a right filter in /etc/lvm/lvm.conf to use intended devices.
I hope this is not necessary.
Thanks, Malahal.
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