Thanks, guru:-) Vincent Chen EMC2 | E-Lab Linux team
-----Original Message----- From: boun...@canonical.com [mailto:boun...@canonical.com] On Behalf Of Cruz Bishop Sent: Sunday, April 29, 2012 5:49 AM To: Chen, Vincent Subject: [Bug 985741] Re: multipath can't show device on which is setup lvm Good to see this was all sorted, Vincent! Have fun with Ubuntu :) @Peter: Thank you -- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/985741 Title: multipath can't show device on which is setup lvm Status in “multipath-tools” package in Ubuntu: Invalid Bug description: root@SGELLIN119:~# lsb_release -rd Description: Ubuntu 11.10 Release: 11.10 affect package: multipath-tools, lvm2 If creating logical volume with Multipath on disk primary partition 1, multipath can’t find the disks. Syslog show such error when booting system kernel: [ 27.604034] device-mapper: table: 252:5: multipath: error getting device kernel: [ 27.604115] device-mapper: ioctl: error adding target to table I use fdisk to create two partitions on one physical lun. Mpath6: /dev/mapper/mpath6-part1 /dev/mapper/mpath6-part2 Mpath7: /dev/mapper/mpath7-part1 /dev/mapper/mpath7-part2 create a logical volume on mpath6-part2, mpath7-part2 Reboot host, there is no exception and error logs. Multipath could Find all devices. root@SGELLIN119:~# multipath -ll | grep SYMM mpath9 (360000970000192602316533030453335) dm-10 EMC,SYMMETRIX mpath8 (360000970000192602316533030453334) dm-6 EMC,SYMMETRIX mpath7 (360000970000192602316533030453333) dm-7 EMC,SYMMETRIX mpath6 (360000970000192602316533030453332) dm-4 EMC,SYMMETRIX mpath5 (360000970000192602316533030453331) dm-3 EMC,SYMMETRIX root@SGELLIN119:~# lvs -v Finding all logical volumes LV VG #Seg Attr LSize Maj Min KMaj KMin Origin Snap% Move Copy% Log Convert LV UUID mlv my_vg 1 -wi-a- 1020.00m -1 -1 252 22 c3cECW-CJry-OdXI-O9bZ-lXq8-BUYq-obzcvB sym_lv2 sym_vg2 2 -wi-a- 200.00m -1 -1 252 20 1t9SZa-QEEm-2u6p-lCqN-aqcd-xOpn-dC1YAu sym_lv3 sym_vg3 2 -wi-a- 200.00m -1 -1 252 21 w4H00r-l71s-UURm-C32C-wDuS-fEF2-wlJFI0 Then I use same way to create a lv on mpath6-part1 and mpath7-part1 After rebooting host, there are some error logs happen. Multipath can’t find mpath6 and mapth7. Of course the logical volums on Mpath6 and mpath7 were lost also. root@SGELLIN119:~# multipath -ll| grep SYMM mpath9 (360000970000192602316533030453335) dm-3 EMC,SYMMETRIX mpath8 (360000970000192602316533030453334) dm-2 EMC,SYMMETRIX mpath5 (360000970000192602316533030453331) dm-5 EMC,SYMMETRIX root@SGELLIN119:~# lvs -v Finding all logical volumes LV VG #Seg Attr LSize Maj Min KMaj KMin Origin Snap% Move Copy% Log Convert LV UUID mlv my_vg 1 -wi-a- 1020.00m -1 -1 252 1 c3cECW-CJry-OdXI-O9bZ-lXq8-BUYq-obzcvB the finding is that if creating lvm on disk primary partition 1. Something were changed and it lead multipath couldn’t find devices. root@SGELLIN119:~# udevadm info --query=all --name=/dev/mapper/mpath6 P: /devices/virtual/block/dm-8 N: dm-8 L: -100 S: mapper/mpath6 S: disk/by-id/dm-name-mpath6 S: disk/by-id/dm-uuid-mpath-360000970000192602316533030453332 E: UDEV_LOG=3 E: DEVPATH=/devices/virtual/block/dm-8 E: MAJOR=252 E: MINOR=8 E: DEVNAME=/dev/dm-8 E: DEVTYPE=disk E: SUBSYSTEM=block E: DM_NAME=mpath6 E: DM_UUID=mpath-360000970000192602316533030453332 E: DM_SUSPENDED=0 E: DM_UDEV_RULES=1 E: DEVLINKS=/dev/mapper/mpath6 /dev/disk/by-id/dm-name-mpath6 /dev/disk/by-id/dm-uuid-mpath-360000970000192602316533030453332 Value "L" is negative compare to normal one Here is an temporary recovery way: 4) Service multipath-tools stop 5) Dmsetup remove_all 6) Service multipath-tools start However, the issue is consistent after I reboot OS. If I remove lv ( still have LVM package in OS) , multipath work well. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/985741/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/985741 Title: multipath can't show device on which is setup lvm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/985741/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
