Re: Device ... is still in use.

Milan Broz <[email protected]>
Newsgroups gmane.linux.kernel.device-mapper.dm-crypt
Message-ID <[email protected]>
On 19/08/2019 14:59, Jean-Paul Calderone wrote:
> Hello,
> 
> I have a luks device on removable media that has somehow become stuck on my system.  The physical media has been disconnected but the luks device continues to exist and I cannot remove it.
> 
> cryptosetup close fails:
> 
>     $ sudo cryptsetup close luks-64ca6f08-82c9-4571-a976-f37a83aca3b1
>     Device luks-64ca6f08-82c9-4571-a976-f37a83aca3b1 is still in use.
> 
> 
> I don't understand what is still using the device.  It is not mounted anywhere:
> 
>     $ mount | grep luks-64ca6f08-82c9-4571-a976-f37a83aca3b1

See output of lsblk - it can have mapped partitions or lvm over it,
you need to deactivate it.

Also check lsof output if some process is not stuck keeping something open there.

Milan
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