Re: Mounting a encrypted disk: Fatal error: Required key not available

[Martin Steigerwald <martin@lichtvoll.de>]

Hi Roland,

RlndVt - 26.01.24, 13:22:02 CET:
> On Thursday, 25 January 2024 at 23:54, Martin Steigerwald 
> <martin@lichtvoll.de> wrote:
> > Hi Roland.
> > 
> > RlndVt - 25.01.24, 21:10:25 CET:
> > > I'm having difficulties mounting a new array I've created:
> > > 
> > > # bcachefs mount /dev/sde /mnt/vault/
> > > ERROR - bcachefs_rust::cmd_mount: Fatal error: Required key not
> > > available
> > 
> > This has been discussed before. A possible work-around is:
> > 
> > Re: Error while unlocking encrypted BCacheFS: Required key not
> > available
> > 
> > Date: Tue, 16 Jan 2024 11:59:08 -0600
> > 
> > https://lore.kernel.org/linux-bcachefs/
> > CACmrr9gQeXccyS9ZRiR2KnTKnA6EVBCVz_YWcDC3p1mbGqgMSg@mail.gmail.com/
> > 
> > I did not yet take time to test it, but I think for George it worked.
[…]
> Thanks; from the #bcache IRC I got the advice to try unlocking with the
> `-k session` option, which worked for me.

It did not work for me. I tried

bcachefs unlock -k session /dev/sda1

but could not mount it:

error requesting encryption key: ENOKEY

The sequence

bcachefs unlock /dev/sda1

keyctl link @u @s

does work. The "keyctl" command is from the mail I linked above.

Now on to copying 1,4 TiB of data once again as Transcend XS2000 4 TB 
external SSD does not seem to like UAS. Lots of timeouts and I/O errors 
after a certain time. BCacheFS told a lot of interesting stuff to kernel 
log, but that is to be expected on timeouts and write errors. BCacheFS is 
not to blame for that.

Thus I recreated the file system and start from scratch after adding the 
following quirk:

% cat /etc/modprobe.d/disable-uas.conf
# Does not work with external SSD Transcend XS2000 4TB
options usb-storage quirks=0951:176b:u

I hope it works stable with usb-storage only instead of uas.

Will provide bug report to USB people about that.

Best,
-- 
Martin