Can I reclaim "unrecoverable partition" on storage device (RAID set) - no data recovery required

I would like to know if I can reclaim all of my storage. I do not need to recover data, I am free to be as invasive as I need to be.

Situation: two controllers, each with eight disks, two RAID sets (RAID6). One RAID set is handed off to the OS showing 2.2TB, the other shows 12TB.

I ran a deep scan using testdisk and it returned several dozens of "unrecoverable partitions" but I couldn't find a way to tell testdisk to just remove those partitions and give me all my space back.

testdisk has come back with: The harddisk (2199 GB / 2048 GiB) seems too small! (< 29 TB / 26 TiB) Check the harddisk size: HD jumpers settings, BIOS detection... (maybe there is a jumper or setting somewhere?)

Are the unrecoverable partitions preventing the OS from "seeing" the full size of 12TB? How can I remove unrecoverable partitions and get all of my disk space back?



Adaptec Controllers

Other than the following meaningless diffs, they are both Adaptec 5805 controllers running 1.2.0.30300:

[email protected]:~# arcconf getconfig 2 AD > /tmp/adapter2.info [email protected]:~# arcconf getconfig 1 AD > /tmp/adapter1.info [email protected]:~# diff /tmp/adapter1.info /tmp/adapter2.info 8,10c8,10 <    Controller Serial Number                 : xxxxxxxxxxx <    Physical Slot                            : 3 <    Temperature                              : 77 C/ 170 F (Normal)  >    Controller Serial Number                 : yyyyyyyyyyy >    Physical Slot                            : 4 >    Temperature                              : 76 C/ 168 F (Normal) 


RAID sets

The RAID sets are as I'd expect according to the RAID controller's mgmt tool, arcconf:

[email protected]:~# arcconf getconfig 1 ld Controllers found: 2 ---------------------------------------------------------------------- Logical device information ---------------------------------------------------------------------- Logical device number 0    Logical device name                      : STORAGE1    RAID level                               : 6 Reed-Solomon    Status of logical device                 : Optimal    Size                                     : 11427830 MB    Stripe-unit size                         : 256 KB <...snip...>  [email protected]:~# arcconf getconfig 2 ld | more Controllers found: 2 ---------------------------------------------------------------------- Logical device information ---------------------------------------------------------------------- Logical device number 0    Logical device name                      : STORAGE2    RAID level                               : 6 Reed-Solomon    Status of logical device                 : Optimal    Size                                     : 11427830 MB    Stripe-unit size                         : 256 KB <...snip...> 


OS programs

lsscsi output:

[email protected]:~# lsscsi -s | grep Adaptec [0:0:0:0]    disk    Adaptec  STORAGE1        V1.0  /dev/sdc   2.19TB [7:0:0:0]    disk    Adaptec  STORAGE2        V1.0  /dev/sdd   11.9TB 

testdisk reports:

Disk /dev/sdc - 2199 GB / 2048 GiB - CHS 267349 255 63 Disk /dev/sdd - 11 TB / 10 TiB - Adaptec STORAGE2 

After a scan, testdisk shows several partitions:

The following partitions can't be recovered:      Partition               Start        End    Size in sectors >  MS Data                    52734 19503545853 19503493120    MS Data                    52736 19503545855 19503493120    MS Data                   262654 19503755773 19503493120    MS Data                   262656 19503755775 19503493120    MS Data                   367102 19503860221 19503493120    MS Data                   367104 19503860223 19503493120    MS Data                  1311742 19504804861 19503493120    MS Data                  1311744 19504804863 19503493120    MS Data                  1312254 19504805373 19503493120    MS Data                  1312256 19504805375 19503493120 <...snip...> 

lsblk also only shows 2TB:

[email protected]:~# lsblk NAME                 MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT sdc                    8:32   1     2T  0 disk sdd                    8:48   1  10.9T  0 disk 


Other things

I've tried:

1.) Use dd to write all zeros to the full disk but it only wrote to 2.2TB until stopped with the message "No space left on device". Again, only writing to 2.2TB of space.

[email protected]:~# dd if=/dev/zero of=/dev/sdc bs=8M dd: error writing ‘/dev/sdc’: No space left on device 262145+0 records in 262144+0 records out 2199023255552 bytes (2.2 TB) copied, 2870.71 s, 766 MB/s [email protected]:~# fdisk -l /dev/sdc  Disk /dev/sdc: 2 TiB, 2199023255552 bytes, 4294967296 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 

2.) Use parted to remove all partitions and just hand the OS an unpartitioned drive.

[email protected]:~# parted /dev/sdc GNU Parted 3.2 Using /dev/sdc Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Error: /dev/sdc: unrecognised disk label Model: Adaptec STORAGE1 (scsi) Disk /dev/sdc: 2199GB Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: 

3.) I've attempted to rebuild the RAID set, deleting and recreating the RAID set, and smartctl scanning all disks. No change.

4.) gpart /dev/sdc returns some stuff but doesn't suggest that I can do much about it (just returns me to my prompt, doesn't stay in gpart interactive mode).

[email protected]:~# gpart /dev/sdc  Begin scan... End scan.  Checking partitions... Ok.  Guessed primary partition table: Primary partition(1)    type: 000(0x00)(unused)    size: 0mb #s(0) s(0-0)    chs:  (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r  Primary partition(2)    type: 000(0x00)(unused)    size: 0mb #s(0) s(0-0)    chs:  (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r  Primary partition(3)    type: 000(0x00)(unused)    size: 0mb #s(0) s(0-0)    chs:  (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r  Primary partition(4)    type: 000(0x00)(unused)    size: 0mb #s(0) s(0-0)    chs:  (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r 

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Category: linux Time: 2016-07-28 Views: 2

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