From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.9) Gecko/20050715 Firefox/1.0.5 Description of problem: I am doing some initial testing on RHES4-U2 beta release, in particular I'm testing dm-multipath/multipath-tools with a 3PAR storage array. When trying to partition the /dev/mapper/xxxxx devices fdisk gives the following error... ----------------------------------------------------------------- Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 22: Invalid argument. The kernel still uses the old table. The new table will be used at the next reboot. Syncing disks. ----------------------------------------------------------------- Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: Setup a multipathed device with the multipath command Run fdisk on the created disk device Save out partition table Actual Results: Table was not re-read Expected Results: Table should of been re-read and used by the kernel Additional info:
The kernel can't use the partition tables on these devices. Instead we run 'kpartx' to set them up from userspace using device-mapper. *** This bug has been marked as a duplicate of 160277 ***