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I have been using raid0 with four disk over two years. But suddenly it started giving and error at logging

Errors were found while checking the disk drive for /

in order to solve this i booted the machine with a live cd and tried to fix the file system with fsck -f /dev/md0

But since then I dont find the /dev/md0.

the result of fdisk -l

root@PartedMagic:~# fdisk -l

Disk /dev/sda: 128.0 GB, 128035676160 bytes

255 heads, 63 sectors/track, 15566 cylinders, total 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00013cca

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1            2048   233969663   116983808   fd  Linux raid autodetect
/dev/sda2       233971710   250068991     8048641    5  Extended
/dev/sda5       233971712   250068991     8048640   82  Linux swap / Solaris

Disk /dev/sdb: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders, total 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00008184

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   233969663   116983808   fd  Linux raid autodetect
/dev/sdb2       233971710   250068991     8048641    5  Extended
/dev/sdb5       233971712   250068991     8048640   82  Linux swap / Solaris

Disk /dev/sdc: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders, total 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000343d1

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048   233969663   116983808   fd  Linux raid autodetect
/dev/sdc2       233971710   250068991     8048641    5  Extended
/dev/sdc5       233971712   250068991     8048640   82  Linux swap / Solaris

Disk /dev/sdd: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders, total 250069680 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002d929

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1   *        2048   233969663   116983808   fd  Linux raid autodetect
/dev/sdd2       233971710   250068991     8048641    5  Extended
/dev/sdd5       233971712   250068991     8048640   82  Linux swap / Solaris*

But now the system does not boot. I think the reason is as the /dev/md0 is not available.

root@PartedMagic:~# mdadm --detail /dev/md0
mdadm: cannot open /dev/md0: No such file or directory

I need the data available in the drives. Can some one help me with fixing this so i can at least retrieve my data.

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