NTFS signature is missing, trying to mount RAID-5 volume

ofuser · 10-14-2010, 05:07 AM

I'm trying to mount a RAID-5 volume running under Parted Magic but receive an error when I try to mount the volume group with it stating the "NTFS signature is missing". It's a software raid across four hard drives. Can someone give me some pointers as to where I'm going wrong?

I started with the following steps to gain access to the RAID set:

Code:

mdadm --assemble --scan
mdadm: /dev/md/0_0 has been started with 4 drives.

pvs /dev/md/0_0
  PV          VG      Fmt  Attr PSize PFree
  /dev/md/0_0 storage lvm2 a-   1.35T    0 

lvdisplay /dev/storage
  --- Logical volume ---
  LV Name                /dev/storage/archive
  VG Name                storage
  LV UUID                ZgG8Th-xKpZ-gGCK-WDiH-M8NX-LACN-sW0d1I
  LV Write Access        read/write
  LV Status              NOT available
  LV Size                1.35 TB
  Current LE             44319
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto

vgchange -a y /dev/storage
1 logical volume(s) in volume group "storage" now active

mkdir /mnt/raid

mount /dev/storage/archive /mnt/raid
NTFS signature is missing.
Failed to mount '/dev/mapper/storage-archive': Invalid argument
The device '/dev/mapper/storage-archive' 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?

I appreciate any assistance! :-)

prayag_pjs · 10-14-2010, 05:13 AM

Hi,

See i this link helps you

http://www.linuxquestions.org/questi...64-bit-769017/

ofuser · 10-14-2010, 07:54 AM

Hi prayag_pjs,

I've given those instructions a go but they don't work for me as I'm not using GPT or a hardware RAID controller.

schanhorst · 10-14-2010, 10:29 PM

try to use the "/dev/md/0_0" device for mounting:
mount /dev/md/0_0 /mnt/raid

ofuser · 10-15-2010, 02:21 AM

Hi schanhorst,

That unfortunately that doesn't work as it just reports "unknown filesystem type "LVM2_member"" as it contains a logical volume.