On 2/18/21 3:57 PM, Chris Murphy wrote: > metadata raid6 as well? Yes.
> What replacement command(s) are you using? For this drive, it was "btrfs replace start -r 3 /dev/sda3 /" > What device is devid 3? It would normally be sdc3. I'll address the confusion below. > 16315=0x3fbb, 16283=0x3f9b, 16315^16283 = 32 or 0x20 > 11111110111011 > 11111110011011 > ^ > > Do a RAM test for as long as you can tolerate it, or it finds the > defect. Sometimes they show up quickly, other times days. I didn't think of a flipped bit. Thanks. >> devid 0 size 457.64GiB used 39.53GiB path /dev/sdc3 >> devid 1 size 457.64GiB used 39.56GiB path /dev/sda3 >> devid 2 size 457.64GiB used 39.56GiB path /dev/sdb3 >> devid 4 size 457.64GiB used 39.53GiB path /dev/sdd3 > > This is confusing. devid 3 is claimed to be missing, but fi show isn't > showing any missing devices. If none of sd[abcd] are devid 3, then > what dev node is devid 3 and where is it? It looks to me like btrfs is temporarily assigning devid 0 to the new device being used as a replacement. That is what I observed before; once the replace operation was complete, it went back to the normal number. Since the replacement didn't finish this time, sdc3 is still devid 0. > But yeah you're probably best off not trying to fix this file system > until the memory is sorted out. Right. I'll get on that soon and see if anything pops up. Thanks for the help so far.