Unrecognized disk label of a external HD Post: 302471335

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Special Forums Hardware Unrecognized disk label of a external HD Post 302471335 by cokedude on Friday 12th of November 2010 02:10:03 PM

11-12-2010

Registered User

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....|

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LEARN ABOUT NETBSD

mbrlabel

MBRLABEL(8)						    BSD System Manager's Manual 					       MBRLABEL(8)

NAME

     mbrlabel -- update disk label from MBR label(s)

SYNOPSIS

     mbrlabel [-fqrw] [-s sector] device

DESCRIPTION

     mbrlabel is used to update a NetBSD disk label from the Master Boot Record (MBR) label(s) found on disks that were previously used on
     DOS/Windows systems (or other MBR using systems).

     mbrlabel scans the MBR contained in the very first block of the disk (or the block specified through the -s flag), then walks through every
     extended partition found and generates additional partition entries for the disk from the MBRs found in those extended partitions.

     Each MBR partition which does not have an equivalent partition in the disk label (equivalent in having the same size and offset) is added to
     the first free partition slot in the disk label.  A free partition slot is defined as one with an fstype of 'unused' and a size of zero
     ('0').  If there are not enough free slots in the disk label, a warning will be issued.

     The raw partition (typically partition c, but d on i386 and some other platforms) is left alone during this process.

     By default, the proposed changed disk label will be displayed and no disk label update will occur.

     Available options:

     -f 	Force an update, even if there has been no change.

     -q 	Performs operations in a quiet fashion.

     -r 	In conjunction with -w, also update the on-disk label.

     -s sector	Specifies the logical sector number that has to be read from the disk in order to find the MBR.  Useful if the disk has remapping
		drivers on it and the MBR is located in a non-standard place.  Defaults to 0.

     -w 	Update the in-core label if it has been changed.  See also -r.

SEE ALSO

     disklabel(8), dkctl(8), fdisk(8), mbr(8)

HISTORY

     The mbrlabel command appeared in NetBSD 1.4.

BSD
								   April 5, 2010							       BSD

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