Am 21.02.2013 18:17, schrieb Stone:

Am 21.02.2013 17:54, schrieb Phil Turmel:

quoted

On 02/21/2013 11:51 AM, Stone wrote:

quoted

the dead-key was pressed
here the output:
root@bender:~# dd if=/dev/zero bs=1024 count=12 seek=1073006628
of=/dev/sdc1
12+0 records in
12+0 records out
12288 bytes (12 kB) copied, 0,00019109 s, 64,3 MB/s
root@bender:~# dd if=/dev/zero bs=1024 count=12 seek=1073101016
of=/dev/sdc1
12+0 records in
12+0 records out
12288 bytes (12 kB) copied, 0,00017799 s, 69,0 MB/s
root@bender:~# dd if=/dev/zero bs=1024 count=8 seek=1335739456 
of=/dev/sdc1
8+0 records in
8+0 records out
8192 bytes (8,2 kB) copied, 0,000159338 s, 51,4 MB/s
root@bender:~# dd if=/dev/zero bs=1024 count=8 seek=1346771164 
of=/dev/sdc1
8+0 records in
8+0 records out
8192 bytes (8,2 kB) copied, 0,000161977 s, 50,6 MB/s
root@bender:~# dd if=/dev/zero bs=1024 count=8 seek=1348581732 
of=/dev/sdc1
8+0 records in
8+0 records out
8192 bytes (8,2 kB) copied, 0,000157825 s, 51,9 MB/s

Very good.

quoted

now i boot my server with a live cd and recreate my raid.
if this was successfully i open the LUKS and check it.
here my commands for this step:
mdadm --create /dev/md2 --assume-clean --verbose --level=5
--raid-devices=4 /dev/sdc1 /dev/sdd1 missing /dev/sdf1
cryptsetup luksOpen /dev/md2 md2_nas
fsck -n /dev/md2

Looks good.

Phil

i created the raid successfulle and the LUKS is open!
this is the output of my fsck
fsck -n /dev/mapper/md2_nas
fsck from util-linux 2.19.1
e2fsck 1.41.14 (22-Dec-2010)
fsck.ext2: Superblock invalid, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open 
/dev/mapper/md2_nas

The superblock could not be read or does not describe a correct ext2
filesystem.  If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate 
superblock:
    e2fsck -b 8193 <device>

i coud try to restore the superblock. the filesystem is ext4....
is this the right way?
mke2fs -n -j /dev/mapper/md2_nas
mke2fs 1.41.14 (22-Dec-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=128 blocks, Stripe width=384 blocks
366288896 inodes, 1465133568 blocks
73256678 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
44713 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
         32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 
2654208,
         4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
         102400000, 214990848, 512000000, 550731776, 644972544