Re: [dm-crypt] can't open luks device after raid 5 rebuild

[artificial11000 <artificial11000@googlemail.com>]

Hi,

as I noticed that I can't access the device, I recreated the raid manually.
  mdadm --create --level=5 -n 3 /dev/md127 /dev/sdb /dev/sdc /dev/sdd

Could this damage the key-slot?
Are the metadata of the RAID relevant to this?
I read that old versions of mdadm created RAIDs with metadata=0.90 and 
the newer versions with metadata=1.20.

artificial

On 04/08/2012 05:47 PM, Arno Wagner wrote:
> Hi,
>
> a RAID degradation and successful rebuild does not have this
> effect. Did you do something else? Or did you do a manual (forced)
> rebuild? What exactly did happen to the RAID and what did you
> do to fix it?
>
> The symptoms you see are typical for a damaged key-slot. The
> header resides in a single sector and is not affected.
> If so, a header backup is possibly the  only thing that will
> help you, see the FAQ for details.
>
> Arno
>
> On Sun, Apr 08, 2012 at 03:04:47PM +0200, artificial11000 wrote:
>> Hi guys,
>>
>> after my encrypted RAID 5 was degraded and rebuilt, I can't open it anymore.
>>
>> cryptsetup luksOpen /dev/md127 archiv
>> Geben Sie den Passsatz f?r /dev/md127 ein:
>> Kein Schl?ssel mit diesem Passsatz verf?gbar.
>>
>> It says that the provided password doesn't match any of the stored keys.
>>
>> Here's the output of luksDump:
>>
>> cryptsetup luksDump /dev/md127
>> LUKS header information for /dev/md127
>>
>> Version:           1
>> Cipher name:       aes
>> Cipher mode:       xts-plain
>> Hash spec:         sha1
>> Payload offset:    4040
>> MK bits:           512
>> MK digest:         53 24 e5 1d 68 3e f1 5f 96 56 06 23 85 4a b6 89
>> 07 de 52 1d
>> MK salt:           5b 2e 4b 48 d8 2f 91 52 90 79 3b 6e 73 13 52 f1
>>                     8f 9e 35 50 8e 25 9e 92 22 52 48 26 44 d7 bd 6c
>> MK iterations:     10
>> UUID:              3fbd3c47-8dc3-4541-8960-00c0a80c8ae9
>>
>> Key Slot 0: ENABLED
>>      Iterations:             363564
>>      Salt:                   32 db 41 40 56 fe 6f a9 c7 e4 c4 5f a0 4c 52 db
>>                                8e df 07 8c 9b 32 86 e6 ac 0c 8a e6 c4
>> 69 31 0f
>>      Key material offset:    8
>>      AF stripes:                4000
>> Key Slot 1: DISABLED
>> Key Slot 2: DISABLED
>> Key Slot 3: DISABLED
>> Key Slot 4: DISABLED
>> Key Slot 5: DISABLED
>> Key Slot 6: DISABLED
>> Key Slot 7: DISABLED
>>
>>
>> Can anyone help me?
>>
>> Regards
>> artificial
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>