Unrecognized disk label of a external HD

 
Thread Tools Search this Thread
Special Forums Hardware Unrecognized disk label of a external HD
# 1  
Old 11-12-2010
Unrecognized disk label of a external HD

I have a external HD that I can't seem to open. When I try to open it with gparted it says unrecognized disk. When I run gparted from the terminal this is what it says.

Code:
~ $ sudo gparted
======================
libparted : 2.2
======================
/dev/sdb: unrecognised disk label

When I run the fdisk command this is what it says.

Code:
~ $ sudo fdisk -l

Disk /dev/sda: 100.0 GB, 100030242816 bytes
255 heads, 63 sectors/track, 12161 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000c8b89

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        1245     9999360   83  Linux
/dev/sda2            1246        5478    33998849    5  Extended
/dev/sda3   *        5479       12161    53681197+   7  HPFS/NTFS
/dev/sda5            1246        1743     3998720   82  Linux swap / Solaris
/dev/sda6            1744        5478    29999104   83  Linux

Disk /dev/sdb: 203.9 GB, 203928109056 bytes
255 heads, 63 sectors/track, 24792 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

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

# 2  
Old 11-12-2010
Might be that the disk label has not been initialized yet. Is this a new disk, or has it been used before? If it's already been used: under which OS and version?
# 3  
Old 11-12-2010
I also get this message when I try to mount the HD. I tried with and without the force option.

Code:
~ $ sudo mount -t ntfs-3g /dev/sdb /media/hd-ntfs -o force
NTFS signature is missing.
Failed to mount '/dev/sdb': Invalid argument
The device '/dev/sdb' 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?

~ $ sudo mount -t ntfs-3g /dev/sdb /media/hd-ntfs
NTFS signature is missing.
Failed to mount '/dev/sdb': Invalid argument
The device '/dev/sdb' 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?

---------- Post updated at 04:57 AM ---------- Previous update was at 04:55 AM ----------

Quote:
Originally Posted by pludi
Might be that the disk label has not been initialized yet. Is this a new disk, or has it been used before? If it's already been used: under which OS and version?
It has a NTFS partition. I use it in both windows xp and Linux Mint which is very similar to Ubuntu.
# 4  
Old 11-12-2010
Is it a Western Digital unit?
what specific OS are you trying to mount it on?
# 5  
Old 11-12-2010
Quote:
Originally Posted by fpmurphy
Is it a Western Digital unit?
what specific OS are you trying to mount it on?
No its Maxtor.

Linux Mint and Windows XP. Neither can open it.
# 6  
Old 11-12-2010
Clearly the boot sector's been stomped on somehow at the very least.

Try sudo dd if=/dev/sdb count=$((2*16384)) | hexdump -C | less which should show a binary dump of the first sixteen megs of the drive. Hunt for NTFS in that listing in less by typing "/NTFS" and hitting enter. If it finds it that means the partition might still exist and might still be accessible if you can create a partition on the disk matching it's exact placement.
# 7  
Old 11-12-2010
Quote:
Originally Posted by Corona688
Clearly the boot sector's been stomped on somehow at the very least.

Try sudo dd if=/dev/sdb count=$((2*16384)) | hexdump -C | less which should show a binary dump of the first sixteen megs of the drive. Hunt for NTFS in that listing in less by typing "/NTFS" and hitting enter. If it finds it that means the partition might still exist and might still be accessible if you can create a partition on the disk matching it's exact placement.
I saw it a few times. How would I pipe that in a log file? Less keeps on getting stuck on me when I try to search. This is the command I used and it just made a empty log file.
Code:
sudo dd if=/dev/sdb count=$((2*16384)) | hexdump -C | > /home/bob/Desktop/lspci

Since I do see NTFS how would I fix it?

---------- Post updated at 02:10 PM ---------- Previous update was at 01:59 PM ----------

I also found this and this looks promising Smilie.
Code:
00007f80  eb f2 c3 0d 0a 41 20 64  69 73 6b 20 72 65 61 64  |.....A disk read|
00007f90  20 65 72 72 6f 72 20 6f  63 63 75 72 72 65 64 00  | error occurred.|
00007fa0  0d 0a 4e 54 4c 44 52 20  69 73 20 6d 69 73 73 69  |..NTLDR is missi|
00007fb0  6e 67 00 0d 0a 4e 54 4c  44 52 20 69 73 20 63 6f  |ng...NTLDR is co|
00007fc0  6d 70 72 65 73 73 65 64  00 0d 0a 50 72 65 73 73  |mpressed...Press|
00007fd0  20 43 74 72 6c 2b 41 6c  74 2b 44 65 6c 20 74 6f  | Ctrl+Alt+Del to|
00007fe0  20 72 65 73 74 61 72 74  0d 0a 00 00 00 00 00 00  | restart........|
00007ff0  00 00 00 00 00 00 00 00  83 a0 b3 c9 00 00 55 aa  |..............U.|
00008000  05 00 4e 00 54 00 4c 00  44 00 52 00 04 00 24 00  |..N.T.L.D.R...$.|
00008010  49 00 33 00 30 00 00 e0  00 00 00 30 00 00 00 00  |I.3.0......0....|

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. SCO

Unsuccessful install due to unrecognized disk issue

Dear Community! i try to instaled the sco 6 in hp proliant ML350g8 but unsucces, the trouble when i do instaled it undetected hardisk please help me :(:o (7 Replies)
Discussion started by: mnr
7 Replies

2. HP-UX

Expert Recovery Shell - Fatal Error: Unrecognized disk layout

I have a B.11.31 U ia64 system where I swremove the disk driver "SerialSCSI-00 B.11.31.1303 PCI-X/PCI-E SerialSCSI" (by mistake). afterwards the system won;t boot because of the missing disk drivers. I'm trying to recover my kernel by using the image HP-ux_11_31_disc_1.iso Run an Expert... (1 Reply)
Discussion started by: black_fender
1 Replies

3. Hardware

Unrecognized disk label on my external HD

Hi everyone, I have an external hard drive and I accidentally deleted the partition table. Can I restore my files? If I try to run the f-disk command this is what it says Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units =... (1 Reply)
Discussion started by: Sampa
1 Replies

4. Solaris

Script to label a disk

Hi Guys, Do you have any script to label a disk automatically. It is part of my script but I am not able to find solution to label this inside script without user intervention. (2 Replies)
Discussion started by: prashant2507198
2 Replies

5. Solaris

label a slice on disk erorr

Hi there, I am trying to do root volume mirroring on SunFire V210 server. I have two disks in it.First one is c1t0do and second one is c1t1do. Both disks already have partitions in them so I am deleting the partitions of second disk(c1t1do) using format command and selecting cylinder start 0... (2 Replies)
Discussion started by: newbi8321
2 Replies

6. UNIX for Dummies Questions & Answers

How to read a disk label?

Hi there, I'm wondering how to display a disk label (why not edit it but I don't need that yet). I found several commands on forums like disklabel and diskinfo but I can't find them on my system and don't know the package they belong to. Can you help me? Cheers Santiago (2 Replies)
Discussion started by: chebarbudo
2 Replies

7. Solaris

Help:"Bad checksum in disk label" and "Can't open disk label package"?

Hello, I'm brand new to Sun/Solaris. I have a Sun Blade 150, with SunOS 5.8. I wanted to make a backup to prevent future data loss, so I put the disk in a normal PC with Windows XP to try to make a backup with Norton Ghost, the disk was detected, but not the file volume, so I place the disk... (6 Replies)
Discussion started by: Resadija
6 Replies

8. Solaris

ZFS disk label missing

I 'm having problem in importing a zfs pool was getting error device missing and upon further digging found that labels on my disk for zpool are missing Does anyone know how to recover from it ? root@essapl020-u006 # zdb -l /dev/dsk/emcpower0c --------------------------------------------... (0 Replies)
Discussion started by: fugitive
0 Replies

9. Solaris

Warning: No Disk Label

Hi Fellows, I am trying to mirror 2 identical disks on a SUN Ultra 10 machines (with new installation of Solaris 8). In the process, I found 2 issues: 1. prtvtoc /dev/rdsk/c0t0d0s0 | fmthard -s - /dev/rdsk/c0t1d0s0 Result: Disk partitions between the 2 disks do not match up. 2. manually... (2 Replies)
Discussion started by: o51974
2 Replies

10. UNIX for Dummies Questions & Answers

Cannot label disk when partitions are in use as described

:confused: Hello, In my Solaris system, I want to resize my mounted home directory slice. 1.I unmount the slice, #umount /export/home 2.Resize the directory #format>partition> 3.#format>label 4.#format>Cannot label disk when partitions are in use as described. So, How can label ? Thanks (2 Replies)
Discussion started by: XNOR
2 Replies
Login or Register to Ask a Question