Cfrgtkky

I have upgraded my home server from ubuntu 12.04 to 18.04. The system holds 2 disks of 2.0TB in Raid 1. When I try to mount them on the 18.04 I get the following error.

mount -t ntfs /dev/md126 /mnt/media

I have also tries mount -t ntfs-3g without success.

NTFS signature is missing.

Failed to mount '/dev/md126': Invalid argument

The device '/dev/md126' doesn't seem to have a valid NTFS.

Maybe the wrong device is used? Or the whole disk instead of a

partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

The ouput from fdisk -l /dev/md126 is

Units: sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disklabel type: dos

Disk identifier: 0x000136a9



Device       Boot Start        End    Sectors  Size Id Type

/dev/md126p1         63 3907023111 3907023049  1.8T  7 HPFS/NTFS/exFAT



Partition 1 does not start on physical sector boundary.

And the output of gdisk -l is

GPT fdisk (gdisk) version 1.0.3



Partition table scan:

  MBR: MBR only

  BSD: not present

  APM: not present

  GPT: not present





***************************************************************

Found invalid GPT and valid MBR; converting MBR to GPT format

in memory.

***************************************************************





Warning! Secondary partition table overlaps the last partition by

297 blocks!

You will need to delete this partition or resize it in another utility.

Disk /dev/md126: 3907022848 sectors, 1.8 TiB

Sector size (logical/physical): 512/4096 bytes

Disk identifier (GUID): DC6C901E-C3A5-43C1-8C9E-8E6397C5F145

Partition table holds up to 128 entries

Main partition table begins at sector 2 and ends at sector 33

First usable sector is 34, last usable sector is 3907022814

Partitions will be aligned on 8-sector boundaries

Total free space is 29 sectors (14.5 KiB)



Number  Start (sector)    End (sector)  Size       Code  Name

   1              63      3907023111   1.8 TiB     0700  Microsoft basic data

And finally when i check the mdadm --detail /dev/m126 i get the following result

/dev/md126:

         Container : /dev/md/imsm0, member 0

        Raid Level : raid1

        Array Size : 1953511424 (1863.01 GiB 2000.40 GB)

     Used Dev Size : 1953511424 (1863.01 GiB 2000.40 GB)

      Raid Devices : 2

     Total Devices : 2



             State : clean

    Active Devices : 2

   Working Devices : 2

    Failed Devices : 0

     Spare Devices : 0



Consistency Policy : resync





              UUID : 562a1dd0:13fa432c:bec8c322:89cbd43f

    Number   Major   Minor   RaidDevice State

       1       8        0        0      active sync   /dev/sda

       0       8       16        1      active sync   /dev/sdb

When I switch back to the 12.04 (I've installed 18.04 on a new disk) everything works fine.

Does anyone have an idea what is going wrong?

When I try to mount the partition I het a similar error
mount /dev/md126p1 -t ntfs-3g /mnt/media

Failed to read last sector (3907023047): Invalid argument

HINTS: Either the volume is a RAID/LDM but it wasn't setup yet,

   or it was not setup correctly (e.g. by not using mdadm --build ...),

   or a wrong device is tried to be mounted,

   or the partition table is corrupt (partition is smaller than NTFS),

   or the NTFS boot sector is corrupt (NTFS size is not valid).

Failed to mount '/dev/md126p1': Invalid argument

The device '/dev/md126p1' doesn't seem to have a valid NTFS.

Maybe the wrong device is used? Or the whole disk instead of a

partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

You attempt to mount the wrong device. You're trying to mount /dev/mda126, which is not the partition.

Replace /dev/mda126 with /dev/md126p1.