Hi, I want to achieve simple volume management on Linux 2.6 kernel using LVM2 and device mapper. I want to perform following set of operation to do an I/O as i was doing in case of LVM1 and lvm-mod. 1.pvcreate 2.vgcreate 3.lvcreate 4.mkfs on LV 5.mount the LV 6.perform i/o on LV I can see multiple paths to single LU using disk conroller hardware. When i create a PV using LVM2 on a LU with single path it works fine.In this scenario i am able to perform above set of operations. But when i create a PV using LVM2 on one of the paths to a multipath LU fi have following observation 1.UUID is same for all the paths to the LU.Confirmed in pvscan. 2.vgcreate displays message saying "vg created successfully" but vgscan does not display the newly created vg. 3.Backup file /etc/lvm/backup shows the above vg. 4.cannot create and use the lv . Now my query is that Can i achieve a simple volume management using above set of operations on LVM2-Device Mapper?Can lvm2 handle the above scenarion itself or Does it need some extra tool for device consolidation? I had found that following utilities can be used to achieve various features of Device mapper viz. Multipayhing(Load spreading on multiple path),fail over,hot plug detection, device consolidation,mrroring and stripping. 1.. multipath-tools-0.2.1 2. sblim-cmpi-sysfs-1.1.5 3. hotplug-0.44 and hotplugctl-0.08 4. udev-021 5. Kpartx 6. multipathd (daemon) My focus is that i dont want to use any other tool apart from lvm2 and Device mapper.Is it possible or i have to use some device consolidation tool other than lvm2? LVM version i am using is lvm2-2.00.15 Device Mapper version i am using is device-mapper-1.00.09 Regards Sandhya Suman 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@patni.com and delete this mail. _____________________________________________________________________
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