After googling a lot I figure out what to do and it worked - at least I can access the most critical data.
I’ve followed instructions from this blog post: https://blog.monotok.org/lvm-transaction-id-mismatch-and-metadata-resize-error/ <https://blog.monotok.org/lvm-transaction-id-mismatch-and-metadata-resize-error/>

However, I have no idea what was the root cause of this. I hope I can fully recover the volumes w/o re-creating the whole VG.
In case I did something terribly wrong that looked like the solution now, but may cause issues in future - I would appreciate any hints.


—
Best Regards,
Łukasz Czerpak




> On 8 Dec 2019, at 20:35, Łukasz Czerpak <lukasz.czerpak@gmail.com> wrote:
> 
> Hi,
> 
> I cannot get my LVM working. 
> 
> The structure is as follows:
> 
> vg1 -> thinpool1 -> 11x lvs
> 
> I extended size of one of child LVs, after that ran xfs_growfs which got stuck. After 1hr I did cold reboot and thinpool reported the following:
> 
> $ lvchange -ay vg1
> WARNING: Not using lvmetad because a repair command was run.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> Thin pool vg1-thinpool1-tpool (253:3) transaction_id is 549, while expected 505.
> 
> 
> I tried lvconvert —repair vg1/thinpool1 but it always throws transaction id mismatch error:
> 
> $ lvconvert --repair vg1/thinpool1
> WARNING: Disabling lvmetad cache for repair command.
> WARNING: Not using lvmetad because of repair.
> Transaction id 505 from pool "vg1/thinpool1" does not match repaired transaction id 549 from /dev/mapper/vg1-lvol2_pmspare.
> WARNING: LV vg1/thinpool1_meta3 holds a backup of the unrepaired metadata. Use lvremove when no longer required.
> WARNING: New metadata LV vg1/thinpool1_tmeta might use different PVs.  Move it with pvmove if required.
> 
> I have no idea on how to proceed and more importantly *how to access/recover data in LVs*. I desperately looking for any help :(
> 
> —
> Best regards,
> Łukasz Czerpak
> 
> 
>