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I'm using ubuntu 12.04.4 Server and this is my current setup:

My hard disks:

wax@petra:~$ sudo fdisk -l /dev/sda

Disk /dev/sda: 1500.3 GB, 1500301910016 bytes
255 testine, 63 settori/tracce, 182401 cilindri, totale 2930277168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00000000

Dispositivo Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63  2930272064  1465136001   fd  Autorilevamento raid di Linux

wax@petra:~$ sudo fdisk -l /dev/sdb

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 testine, 63 settori/tracce, 182401 cilindri, totale 2930277168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x00000000

Dispositivo Boot      Start         End      Blocks   Id  System
/dev/sdb1              63  2930272064  1465136001   fd  Autorilevamento raid di Linux

wax@petra:~$ sudo fdisk -l /dev/sdc

Disk /dev/sdc: 163.9 GB, 163928604672 bytes
255 testine, 63 settori/tracce, 19929 cilindri, totale 320173056 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Identificativo disco: 0x8f8000b1

Dispositivo Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048     3905535     1951744   82  Linux swap / Solaris
/dev/sdc2         3907582   320172031   158132225    5  Esteso
/dev/sdc5   *     3907584   320172031   158132224   83  Linux

wax@petra:~$ sudo fdisk -l /dev/sdd

Disk /dev/sdd: 3000.6 GB, 3000592982016 bytes
255 testine, 63 settori/tracce, 364801 cilindri, totale 5860533168 settori
Unità = settori di 1 * 512 = 512 byte
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Identificativo disco: 0x00000000

Il disco /dev/sdd non contiene una tabella delle partizioni valida

This is the mdadm output:

wax@petra:~$ cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md1 : active raid1 sdd[3] md0[2]
      2930135360 blocks super 1.2 [2/2] [UU]

md0 : active linear sdb[0] sda[1]
      2930277152 blocks super 1.2 0k rounding

unused devices: <none>

Why sda1 and sdb1 are market as boot? My boot disk is sdc. Also grub is installed in sdc AND in sda I think that's an error right?

Why sda and sdb have partitions while sdd doesn't?

Is there something wrong with my setup?

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