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I have a 256GB SSD (Ubuntu/Win8), and two 1TB drives in RAID 1.

The problem is that I just recently added another two drives that are 4TB in RAID 1 but they aren't detected in Ubuntu as one drive but separate.

I know it works because Windows detected my new 4TB RAID 1 just fine, here's a screenshot via one of the raid disk utilities that came with my motherboard (fakeraid).

Detected in Windows 8

fdisk -l

Disk /dev/sda: 256.1 GB, 256060514304 bytes
255 heads, 63 sectors/track, 31130 cylinders, total 500118192 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: 0x0a7f44fd

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1   500118191   250059095+  ee  GPT

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdb: 4000.8 GB, 4000787030016 bytes
255 heads, 63 sectors/track, 486401 cylinders, total 7814037168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdc: 4000.8 GB, 4000787030016 bytes
255 heads, 63 sectors/track, 486401 cylinders, total 7814037168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Disk /dev/sdc doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x00000000

Disk /dev/sdd doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sde: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x00000000

Disk /dev/sde doesn't contain a valid partition table

WARNING: GPT (GUID Partition Table) detected on '/dev/mapper/ddf1_TeraRAID'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/mapper/ddf1_TeraRAID: 1000.1 GB, 1000120999936 bytes
255 heads, 63 sectors/track, 121591 cylinders, total 1953361328 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: 0x00000000

                    Device Boot      Start         End      Blocks   Id  System
/dev/mapper/ddf1_TeraRAID1               1  1953361327   976680663+  ee  GPT

Disk /dev/mapper/ddf1_TeraRAID1: 134 MB, 134217728 bytes
255 heads, 63 sectors/track, 16 cylinders, total 262144 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: 0x00000040

Disk /dev/mapper/ddf1_TeraRAID1 doesn't contain a valid partition table

Disk /dev/mapper/ddf1_TeraRAID2: 998.9 GB, 998911246336 bytes
255 heads, 63 sectors/track, 121444 cylinders, total 1950998528 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: 0x73736572

This doesn't look like a partition table
Probably you selected the wrong device.

                      Device Boot      Start         End      Blocks   Id  System
/dev/mapper/ddf1_TeraRAID2p1      1920221984  3736432267   908105142   72  Unknown
/dev/mapper/ddf1_TeraRAID2p2   ?  1936028192  3889681299   976826554   6c  Unknown
/dev/mapper/ddf1_TeraRAID2p3   ?           0           0           0    0  Empty
/dev/mapper/ddf1_TeraRAID2p4        27722122    27722568         223+   0  Empty

Disk /dev/mapper/ddf1_TeraRAID3: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders, total 2097152 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: 0x00000000

Disk /dev/mapper/ddf1_TeraRAID3 doesn't contain a valid partition table

blkid

/dev/sda1: LABEL="Recovery" UUID="0AE412DFE412CD37" TYPE="ntfs" 
/dev/sda2: UUID="0613-84B4" TYPE="vfat" 
/dev/sda4: UUID="3A1214B712147A59" TYPE="ntfs" 
/dev/sda5: UUID="dbb033df-b455-41c5-a050-d6aa816462a1" TYPE="ext4" 
/dev/sda6: UUID="8577fdea-9aef-4789-b62e-86100019d2e1" TYPE="swap" 
/dev/sdd: TYPE="ddf_raid_member" 
/dev/sde: TYPE="ddf_raid_member" 
/dev/mapper/ddf1_TeraRAID2: LABEL="TeraRAID" UUID="202E91BF2E918E82" TYPE="ntfs" 
/dev/mapper/ddf1_TeraRAID3: LABEL="RandomStuff" UUID="00eea61f-86f3-46fb-bd66-07da8355a2f4" TYPE="ext4"

My 4TB drives /dev/sdb and /dev/sdc should be recognized as ddf_raid_member but they're nowhere to be found here...

blkid -p /dev/sdb

this command gives no output

dmraid -rvv /dev/sdb

NOTICE: /dev/sdb: asr     discovering
NOTICE: /dev/sdb: ddf1    discovering
NOTICE: /dev/sdb: hpt37x  discovering
NOTICE: /dev/sdb: hpt45x  discovering
NOTICE: /dev/sdb: isw     discovering
NOTICE: /dev/sdb: jmicron discovering
NOTICE: /dev/sdb: lsi     discovering
NOTICE: /dev/sdb: nvidia  discovering
NOTICE: /dev/sdb: pdc     discovering
NOTICE: /dev/sdb: sil     discovering
NOTICE: /dev/sdb: via     discovering
no raid disks and with names: "/dev/sdb"

fstab

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda5 during installation
UUID=dbb033df-b455-41c5-a050-d6aa816462a1 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda2 during installation
#UUID=0613-84B4  /boot/efi       vfat    defaults        0       1
# swap was on /dev/sda6 during installation
UUID=8577fdea-9aef-4789-b62e-86100019d2e1 none            swap    sw              0       0
UUID=0613-84B4  /boot/efi   vfat    defaults    0   1

How can I get Ubuntu to recognize my newly made 4TB RAID 1?

share|improve this question
    
What does sudo blkid -p /dev/sdb say? Also sudo dmraid -rvv /dev/sdb. –  psusi Sep 16 '13 at 20:24
    
blkid -p /dev/sdb/ does nothing, no message. dmraid -rvv /dev/sdb/ gives no raid disks and with names: "/dev/sdb" –  Tek Sep 16 '13 at 20:35
    
For the record I have erased everything again and starting from scratch. Windows does detect the raid but I have not formatted or initialized the disk from windows this time. –  Tek Sep 16 '13 at 20:38
    
There should not be a trailing slash after sdb, and there should be several lines of output from dmraid before that. –  psusi Sep 16 '13 at 21:34
    
Sorry I didn't paste it but manually typed it to you. I meant /dev/sdb all this time. And there are several trailing lines for the dmraid command but I thought it was implied it didn't find anything. I'll paste the output in the question to clear up the confusion. –  Tek Sep 16 '13 at 22:55
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