Hi, I am trying to test multipathing on lvm2. Configuration that i am using is as below: OS : SLES9 ( kernel 2.6.5) lvm : lvm2-2.00.15-0.3 multipath-tools : multipath-tools-0.2.1 udev : udev-021-36.32 sysfs : sblim-cmpi-sysfs-1.1.5-0.2 hotplug : hotplug-0.44-32.21 and hotplugctl-0.08-264.1 device-mapper : device-mapper-1.00.09-17.5 I tried following things : When I dont have multipaths for LUNs: 1) I tried to create PVs on LUNs using pvcreate 2) Then VGs using above PVs by command vgcreate 3) Then I have created some LVs on VGs. 4) I also fire some I/O on these LVs. All aboe commands worked succesfully reflecting changes in pvscan, vgscan and lvscan. When I have multiplepaths to LUNs: I tried to create PV on one of the device but on doing pvscan it shows me some other device. e.g My LUN no 5 has for paths so I can see these four paths as /dev/sdb, /dev/sdg, /dev/sdl and /dev/sdq. then i did following linux# pvcreate /dev/sdb /dev/sdb successfully created linux# pvscan Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdb not /dev/sdq Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdg not /dev/sdq Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdl not /dev/sdq PV /dev/sdq VG vg01 lvm2 [1.00 GB / 972.00 MB free] Total: 1 [1.00 GB] / in use: 1 [1.00 GB] / in no VG: 0 [0 ] linux# vgcreate vg01 succesfully created linux# vgscan Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdb not /dev/sdq Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdg not /dev/sdq Found duplicate PV owucgI06ZCWQHX6rM3Jyj6UKsr5MOt7E: using /dev/sdl not /dev/sdq I tried the same thing with all permutations but i couldnt create a volume group. I also have multipath-tools-0.3.9 and multipath-tools-0.4.2. But I am not sure whether they will compatible with kernel 2.6.5. If you can help me in this scenario I will be thankfull to you. Please let me know the steps through which I can achieve multipathing on my configuration. Thanks and Regards, Shahid Shaikh. http://www.patni.com World-Wide Partnerships. World-Class Solutions. _____________________________________________________________________ This e-mail message may contain proprietary, confidential or legally privileged information for the sole use of the person or entity to whom this message was originally addressed. Any review, e-transmission dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you have received this e-mail in error kindly delete this e-mail from your records. If it appears that this mail has been forwarded to you without proper authority, please notify us immediately at netadmin@xxxxxxxxx and delete this mail. _____________________________________________________________________