On Mon, Feb 04, 2002 at 08:52:53AM -0000, William Blunn wrote: > 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. Yes, it does. BTW: we don't support 2.2 any longer :-( > > 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. Could you send a request to fix (or even better a fix ;-) for MD /proc/partitions/supprt to linux-kernel@vger.kernel.org, please? > > Does anyone know if anyone has made/submitted a (2.2) kernel fix for > this? No, don't know. > > 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. That's likely. > > 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 -- Regards, Heinz -- The LVM Guy -- *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Sistina Software Inc. Senior Consultant/Developer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@Sistina.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ 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
