On Fri, May 06 2011 at 10:55am -0400, Phillip Susi <psusi@cfl.rr.com> wrote: > While trying to convert my mdadm raid5 array from metadata format > 0.9 to 1.0, I forgot to specify the version and it defaulted to 1.2, > which damaged the lvm metadata. After correcting mdadm to 1.0, I > decided to try to recreate the LVM after managing to locate the > volume descriptions in the metadata after manually dumping it. > > The problem I now have is that pvcreate will not use the same > pe_start as before. It was 384 and it is now 3072. I tried using > --metadatasize 192k --dataalignmentsize 0 and it did not help. What > gives? Would be quite helpful if you shared kernel and lvm2 version info... chances are lvm2's data_alignment_detection will shift the data start to the start of the next full stripe of the raid5. You should be able to specify the old start with: --dataalignment 192k --dataalignmentoffset 0 (--dataalignmentoffset 0 likely isn't needed, but it just overrides lvm2's data_alignment_offset detection if it just so happens that raid5 has alignment_offset!=0) _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
