mdadm: Cannot get exclusive access to /dev/md127

[Rich Emberson]

Tried:

# wipefs -a /dev/md127

which did not word, so I next tried:

# wipefs -f -a  /dev/md127
/dev/md127: 6 bytes were erased at offset 0x00000000 (crypto_LUKS): 4c 55
4b 53 ba be

and then

# mdadm  -S /dev/md127
mdadm: Cannot get exclusive access to /dev/md127:Perhaps a running process,
mounted filesystem or active volume group?

but the filesystem is still mounted.

curious, that creating an encrypted raid system on fedora seems to be an
irreversible action.

Now, with part of the raid file system "wipefs"-ed, above, I fear rebooting
and hanging when it does not come up.

Richard
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