Dear Readers of the List .
I had a encrypted RAID 5on my QNAP Device in /dev/md0.
It worked without any problems for about 6 years . But space went low and desaster began.
After adding a disk , mdadm had overwritten the header (block device /dev/md0 ) like this :
6d 64 61 64 6d 3a 20 61 64 64 65 64 20 2f 64 65 mdadm: added /de
76 2f 73 64 63 33 0a 00 00 00 00 00 00 00 00 00 v/sdc3..........
00 00 00 00 00 00 00 00 63 62 63 2d 70 6c 61 69 ........cbc-plai
6e 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 n...............
00 00 00 00 00 00 00 00 73 68 61 31 00 00 00 00 ........sha1....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 08 08 00 00 00 20 ...............
bc 31 80 6d da a4 f0 5c ed 9f 24 96 fc 1b 72 6a
According to the documentation on-disk-format ,
magic (LUKS 0xba 0x be ) , version and cipher name seem to be overwritten.
I'd like to know the possible versions ( 00 01 ? ) and cipher names
(aes ?) in order to be able to reconstruct the header (fingers crossed )
user support from vendor QNAP tried an hour claiming 'fs super block could not be found'
and finally redirected me to 'commercial $$$upport' .
QNAP advertised my Box with 'Disks can be AES-encrypted with 256 bit " so
I suspect its something related with aes .
(And no , I had no header backup, Ahhh !)
Any helpful reply is welcome . And yes , I will make backups in the future . ;-))
Greetings , Florian
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