On Tue, 14 Nov 2017 10:36:22 +0200
Klaus Agnoletti <klaus@xxxxxxxxxxxx> wrote:
> Obviously, I want /dev/sdd emptied and deleted from the raid.
* Unmount the RAID0 FS
* copy the bad drive using `dd_rescue`[1] into a file on the 6TB drive
(noting how much of it is actually unreadable -- chances are it's mostly
intact)
* physically remove the bad drive (have a powerdown or reboot for this to be
sure Btrfs didn't remember it somewhere)
* set up a loop device from the dd_rescue'd 2TB file
* run `btrfs device scan`
* mount the RAID0 filesystem
* run the delete command on the loop device, it will not encounter I/O
errors anymore.
[1] Note that "ddrescue" and "dd_rescue" are two different programs for the
same purpose, one may work better than the other. I don't remember which. :)
--
With respect,
Roman
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