Re: mdadm: Cannot get exclusive access to /dev/md127

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On Mon, Feb 2, 2015 at 5:25 PM, Rich Emberson <emberson.rich@xxxxxxxxx> wrote:
> # cryptsetup status luks-ab8911f9-b3a4-4f33-8b10-7e52c7217ae9
> /dev/mapper/luks-ab8911f9-b3a4-4f33-8b10-7e52c7217ae9 is active.

That's the problem. First use df or mount to see if this device has a
mounted filesystem, and if so unmount it. Then you need to close it.

cryptsetup luksClose luks-ab8911f9-b3a4-4f33-8b10-7e52c7217ae9

Now you can wipefs the md127 device, then stop the array, then wipe
the members of the array.


-- 
Chris Murphy
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