Hi Chris, > From what I understand, no, the smartctl are after the scrub check. That's correct, I ran those shortly before sending the OP. > But it's an open question how long after device failure he > actually noticed it before doing the rebuild and how he did that > rebuild; I noticed something was wrong directy after the reboot. I opened the LUKS container (which worked) and tried to mount the btrfs filesys, which didn't. After noticing the raid was in the state "clean, degraded", I triggered the restore by running mdadm --run, because i already had two hotspares present in the raid. So one of the hotspares was used to do the restore. After that, i ran mdadm --readwrite /dev/md0, because the raid was set to read only. The problem with mounting the btrfs filesys still occurred. > But at this point we need to hear back from Patrick. Sorry for taking so long, long day at work :( > You should not assemble the original RAID anymore anyhow, anything > you write to the array at this point will likely only increase > damages. The overlay allows you to experiment in read-"write" > mode without actually changing anything on your disks. > Agreed. If it turns out there are some repairs needed within Btrfs > it's better with the overlay because it's unclear based on the errors > thus far what repair step to use next, and some of these repair > attempts can still sometimes make things worse (which are of course > bugs, but nevertheless...) I'll look into overlays and try that tomorrow, it's too late and i don't want to further screw this up by doing this half asleep :/ Based on your advice, I'll use an overlay on the array and then try to fix the btrfs filesystem. If I understand correctly, the dm overlay file would enable me to revert to the current state, in case the btrfs repair goes wrong? Regards, Patrick -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
