On Wed, Nov 29, 2017 at 6:33 AM, Klaus Agnoletti <klaus@xxxxxxxxxxxx> wrote: > Hi list > > Can anyone give me any hints here? If not, my plan right now is to > start updating the server to latest debian stable (it's currently > running Jessie), to get access to a newer btrfs driver and tools, > hoping that decreases the risk of something screwing up, and then run > btrfs check --repair on the unmounted fs and wish for the best. > New kernel and tools won't fix this: ERROR: error removing the device '/dev/sdd' - Input/output error I assume when you get that, either when deleting the device or scrubbing, that you also see the device unrecoverable read error in dmesg, as originally reported. If the drive must have the information on that lost sector, and you can't increase SCT ERC time (as well as the kernel SCSI command timer), or increasing it doesn't help, then that data is lost. It's plausible btrfs check repair is smart enough to be able to reconstruct this missing data, but I suspect it isn't yet that capable. So my recommendation is to prepare to lose the file system. Which means backing up whatever you can while it's still working, such as it is. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
