I have some technical questions if I may.
What was the cause? Corruption of the MBR, faulty/erroring disk, some system service that somehow wrote to boot, a faulty update?
Or was it just one of these weird things sometimes happening with some really long running servers that they just seem to wait until system shutdown/reseat to manifest the problem. Could the boot partition already have been damaged for a while? Since these files there are usually loaded into ram from the bootloader, the damage could have originated ever since the last reseat.
What actually caused this? Was it the crash?
If the hash changed, that usually means the data changed. So how is it possible the attachments still exist, but the files have different bits? Was it a distributed file system? Is XFs hash reliant on the exact metadata (creation date and modification date)?
Basically the same question as in the point before with addition, is this because of metadata/encoding of the file metadreplies
Does this mean this goes only for the attachment part of the forum, or the whole forum content, like threads and replies?
How did you guys actually do it in the end? Simple copy of the root dir? Since it was obviously no full file backup, and why was this data missed? Was the normal data also effected by the partition corruption?
Anyway, all in all still good job. And happy to hear some news. Just wanted to ask, since these were questions I had while reading