[linux-lvm] LVM Cache Error: Manual Repair Required

[Ming-Hung Tsai]

How did your cache-pool get broken? Power lost or other cause?

lvconvert --repair is for thin-pools only, so you might need to repair
the cache-pool manually, by using cache_repair and other tools in the
package thin-provisioning-tools. I'm not familiar with dm-cache, so I
don't know whether there's any limitation in cache_repair.

Removing the cache layer might also work, but for safety, you can try
to activate the cache origin manually at first (it might be
data-lv_corig), to see whether the data is fine or not.


Ming-Hung Tsai

2016-12-25 1:44 GMT+08:00 Matt Joyce <mttjocy at gmail.com>:
> $ sudo lvchange -ay hdd-vg/data-lv
>   Check of pool hdd-vg/data-lv_cache failed (status:1). Manual repair required!
>
> $ sudo lvconvert --repair hdd-vg/data-lv
>   Can't repair LV "data-lv" of segtype cache.
>
> $ sudo lvconvert --repair hdd-vg/data-lv_cache
>   Internal error: pool_is_active called with non-pool LV data-lv_cache.
> bad checksum in superblock
>   Repair of thin metadata volume of thin pool hdd-vg/data-lv_cache
> failed (status:1). Manual repair required!
>
> $ sudo lvremove hdd-vg/data-lv_cache
> Do you really want to remove and DISCARD logical volume data-lv_cache? [y/n]: y
>   Check of pool hdd-vg/data-lv_cache failed (status:1). Manual repair required!
>   Failed to active cache locally hdd-vg/data-lv.