On Fri, Oct 19, 2018 at 09:03:50AM -0400, Mike Snitzer wrote: > Please provide the "dmsetup table" line for the cache device if you can. It's torn down by now, unfortunately. I can create a new volume and set it up, if it helps you? > Are you using writeback mode? No, it's writethrough. I'd love to use writeback, but I've lost too much data to it, so I don't really trust it anymore. :-/ Is writethrough actually pure writethrough? When recovering, I had repeated rounds of: - Get to initramfs, which tried to set up the cache and failed. - fsck the real, underlying volume, which had lots of corruption. - Boot from it. - Reboot. - Repeat to step 1. In particular, the volume seemed to become corrupt over and over again (indicating that dm-cache was writing something to it before it failed), until I took out the lines fromcachetab. > Given the "block manager: array validator check failed for block 2156" > error it could easily be that you need to run cache_check and > cache_repair. I hadn't heard of these tools before, and they're not mentioned in device-mapper/cache.txt. (They should probably have been mentioned in the error message, too.) Where can I find them? > Joe (cc'd) may have more specific repair guidance for > you (though Joe is going on vacation.. bad timing). Repair is way too late anyway; like I wrote in the original message, I had to just clear out the entire cache volume to get anywhere. /* Steinar */ -- Homepage: https://www.sesse.net/ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
