On 28 September 2016 at 07:51, Giuliano Procida <giuliano.procida@gmail.com> wrote a load of rubbish: > On 26 September 2016 at 08:54, Giuliano Procida > <giuliano.procida@gmail.com> wrote: >> The net effect is that I now have RAID volumes in an odd state with >> extracted / missing images (I think just a cosmetic issue) and which >> rebuild on every boot (or rather re-activation and use). >> The volumes take a long time to resync, especially concurrently! > > I'm mostly interested in fixing my system but I had a look at the > stderr for the last repair attempt. If I had to make a guess, it would > be that lvconvert is racing against state changes in the kernel and > eventually asking dm-raid to set up an array with mismatched > expectations about whether device 0 should be flagged for rebuild or > not. > > Looking through the LVM code, there is clearly an effort to clear > rebuild flags to prevent just the problem I'm having. Unfortunately, > with lvconvert exiting early these paths are presumably not taken. I > also noticed that the rebuild flag is singled out for exclusion when > generating (backup?) metadata. The last bit's not true. Also, I *do* have consistently REBUILD flags in the on-disk and backed up metadata for the new rmeta and rimage subLVs. I must have been grepping a typo. The questions still remain: > How can I clear REBUILD safely? vgcfgrestore -t and the source code show that trying this will fail until I lvconvert --repair everything off the missing PV and vgreduce --removemissing. The only other thing I can think of at present is to overwrite the text [, "REBUILD"] with spaces and recalculate and re-write the CRC for the metadata; sync and power off the machine (well after running various LVM commands that read the on-disk format!). > Can I renumber _5 to _0 as well at the same time? > Does it make sense to try the latest version of LVM user space tools > to try the final repair conversions? > > --gp _______________________________________________ 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/
