dm-crypt:
I have a Debian 7.10 (Wheezy) computer with a random-key swap device.
The disk and swap are working.
When I try to backup the LUKS header:
# cryptsetup luksHeaderBackup /dev/sda2 --header-backup-file
luksheaderbackup-sda2.bin
Device /dev/sda2 is not a valid LUKS device.
Is this expected/ normal behavior for a dm-crypt/ LUKS random-key swap
partition?
David
# cat /etc/debian_version
7.10
# dpkg-query -l cryptsetup
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-============-============-=================================
ii cryptsetup 2:1.4.3-4 amd64 disk encryption support -
startup
# grep sda2 /etc/crypttab
sda2_crypt /dev/sda2 /dev/urandom
cipher=aes-xts-plain64,size=256,swap
# grep sda2 /etc/fstab
/dev/mapper/sda2_crypt none swap
sw 0 0
# swapon -s
Filename Type Size Used Priority
/dev/mapper/sda2_crypt partition 488444 0 -1
# cryptsetup -v isLuks /dev/sda2
Device /dev/sda2 is not a valid LUKS device.
Command failed with code 22: Device /dev/sda2 is not a valid LUKS device.
# cryptsetup -v luksDump /dev/sda2
Device /dev/sda2 is not a valid LUKS device.
Command failed with code 22: Device /dev/sda2 is not a valid LUKS device.
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