On 04/05/2016 10:38 PM, Milan Broz wrote:
On 04/06/2016 06:25 AM, David Christensen wrote:
LUKS device cannot be used with random volume key, so I guess you use
just plain device without header. (So obviously header backup fails because
there is no header.)
Thank you for the information.
You can verify it by checking entry in /etc/crypttab - no luks keyword:
# grep sda2 /etc/fstab
/dev/mapper/sda2_crypt none swap
or running "cryptsetup status sda2_crypt" over unlocked device
(type is LUKS1 for LUKS devices)
# cryptsetup status sda2_crypt
/dev/mapper/sda2_crypt is active and is in use.
type: PLAIN
cipher: aes-xts-plain64
keysize: 256 bits
device: /dev/sda2
offset: 0 sectors
size: 976896 sectors
mode: read/write
So, what I'm seeing is expected and correct, because a random-key
encrypted swap uses dm-crypt on the raw partition, there is no LUKS
container, and therefore no LUKS header to back up (?).
David
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