Doesn't seem to be a bug in LVM, but it seems that the problem is tickled when migrating from a multiple-MD-devices system to an LVM system. LVM 1.0.1 / kernel 2.2.20 I am using /dev/md0 through /dev/md10 for my existing (non-LVM) system. I put in additional disks, set them up on /dev/md11, and created a PV on /dev/md11. When trying to create the VG, it wouldn't find the PV. Suspiciously, /proc/partitions shows MD devices listed as ... /dev/md8 /dev/md9 /dev/md: /dev/md; instead of what you would expect ... /dev/md8 /dev/md9 /dev/md10 /dev/md11 i.e. (sloppily) implemented as translating the MD number into a single character instead of generating a (potentially multiple character) string of the decimal representation. Swapping /dev/md0 with /dev/md11 makes it all work. So I guess that LVM is accessing /proc/partitions and not seeing any MD devices 10 or higher. That would make it a bug in the kernel, but since people are likely to come across it through LVM I thought it would be a good idea to mention it here. Does anyone know if anyone has made/submitted a (2.2) kernel fix for this? Another little snag is that the code for handling this is right next to where the LVM patch gets applied, so making a patch would likely (I guess) make the LVM patch not apply properly. Bill _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
