12-29-2010
Lost MBR on disk
trying to recover a lost partition table, where the signature (0x55AA) has been lost, though attempting to restore using a number of tools (fdisk, testdisk et al) the write fails.
also the os is unable to read the disk geometry correctly, after attempting to correct the geometry, the updated geometry fails to save.
im lost as to how to get this rebuilt partition table to save.
9 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
First time so excuse my ignorance please.
I may not be accurately describing the issue.
I have inherited a small lab mostly SUN V120s.
We lost power and are trying to recover.
Nope no backups...
The primary issue I have is 1 box is an Oracle Server.
It has 2 36Gb harddrives.
I am able to... (3 Replies)
Discussion started by: murphsr
3 Replies
2. UNIX for Dummies Questions & Answers
I'm confused. Originally I did
telinit 1
cp /dev/sda /dev/sdb
where sda is my boot disk and sdb is a USB disk. This probably copied my MBR.
Since /dev/sdb is 300GB and /dev/sda only 160GB I had a bunch of space left which I decided to experiment with by creating partitions of various... (1 Reply)
Discussion started by: siegfried
1 Replies
3. UNIX for Dummies Questions & Answers
Hi all,
I am newbie here.I want to know what is MBR,boot loader & boot strap programe.
What is procedure of loading OS in to memory.
Thanx in advance:) (1 Reply)
Discussion started by: vishwasrao
1 Replies
4. Ubuntu
Hi All,
Today when I was working on a script to generate custom wordlist. So I ran a script and the output was directed to /tmp.
The disk space was around 19 gb. While the script was running, I decided to direct the o/p file to my 1TB drive. So I broke the run using Ctrl + C.
Now when I... (4 Replies)
Discussion started by: morningSunshine
4 Replies
5. SCO
hi
How can I backup MBR an Partition Table of SCO 5.0.6? (7 Replies)
Discussion started by: ccc
7 Replies
6. Solaris
Hi All
Hope it's okay to post on this sub-forum, couldn't find a better place
I've got a 480R running solaris 8 with veritas volume manager managing all filesystems, including an encapsulated root disk (I believe the root disk is encapsulated as one of the root mirror disks has an entry under... (1 Reply)
Discussion started by: sunnyd76
1 Replies
7. Fedora
Hi,
I just built myself a new machine which has an ASUS motherboard with is UEFI based.
I noticed after I installed Fedora 17 that my sda is MBR and my sdb is GPT:
sda is a ssd drive. Should the ssd drive be GPT or is MBR okay?
sda is 60Gb drive. (3 Replies)
Discussion started by: mojoman
3 Replies
8. Solaris
Hi guys, I appreciate any help in this regard, we have lost sensitive data in the company.
One box with 2 disk mirrored and a 3ware controller handling 13 disks in a raidz2 pool. Suddenly the box restart and keeps "Reading ZFS config" for hours.
Unplugging disk by disk we isolate the disk... (3 Replies)
Discussion started by: tatxo
3 Replies
9. Hardware
Hello everyone. I have a question which I may know the answer to, I'm just looking for a confirmation. When it comes to the MBR of a hard drive, i've read in multiple sources that it's always located in the first sector of the hard drive. Is the MBR there from the factory? When I buy a new blank... (3 Replies)
Discussion started by: Lost in Cyberia
3 Replies
CFDISK(8) GNU fdisk Manual CFDISK(8)
NAME
GNU fdisk, lfdisk, gfdisk - manipulate partition tables on a hard drive
SYNOPSIS
fdisk [options] [device]
DESCRIPTION
fdisk is a disk partition manipulation program, which allows you to create, destroy, resize, move and copy partitions on a hard drive using
a menu-driven interface. It is useful for organising the disk space on a new drive, reorganising an old drive, creating space for new oper-
ating systems, and copying data to new hard disks. For a list of the supported partition types, see the --list-partition-types option
below.
It comes in two variants, gfdisk and lfdisk. Lfdisk aims to resemble Linux fdisk 2.12, while gfdisk supports more advanced disk operations,
like resizing the filesystem, moving and copying partitions. When starting fdisk, the default is to run gfdisk.
OPTIONS
-h, --help
displays a help message.
-v, --version
displays the program's version.
-L, --linux-fdisk
turns on Linux fdisk compatibility mode. This is the same as running lfdisk.
-G, --gnu-fdisk
turns off Linux fdisk compatibility mode.
-i, --interactive
where necessary, prompts for user intervention.
-p, --script
never prompts for user intervention.
-l, --list
lists the partition table on the specified device and exits. If there is no device specified, lists the partition tables on all
detected devices.
-r, --raw-list
displays a hex dump of the partition table of the disk, similar to the way Linux fdisk displays the raw data in the partition table.
-u, --sector-units
use sectors, instead of cylinders for a default unit.
-s, --size=DEVICE
prints the size of the partition on DEVICE is printed on the standard output.
-t, --list-partition-types
displays a list of supported partition types and features.
The following options are available only to lfdisk.
-b, --sector-size=SIZE
Specify the sector size of the disk. Valid values are 512, 1024 and 2048. Should be used only on older kernels, which don't guess
the correct sector size.
-C, --cylinders=CYLINDERS
Specify the number of cylinders of the disk. Currently does nothing, it is left for Linux fdisk compatibility.
-H, --heads=HEADS
Specify the number of heads of the disk. Reasonable values are 255 or 16.
-S, --sectors=SECTORS
Specify the number of sectors per track. A reasonable value is 63.
BUGS
Before editing a BSD disklabel, the partition with the disklabel should already exist on the disk and be detected by the OS. If you have
created a BSD-type partition, you need to write the changes to the disk. If fdisk fails to notify the OS about the changes in partition ta-
ble, you need to restart your computer. As fdisk tries to guess the device holding the BSD disklabel, it might fail to edit it at all, even
if the OS has detected it. In this case you are adviced to simply open the device with fdisk directly. It is possible that it doesn't work
on some operating systems.
Getting the size of a partition with -s might fail, if fdisk fails to guess the disk device, for the same reasons as with the previous bug.
SEE ALSO
mkfs(8), cfdisk(8), parted(8) The fdisk program is fully documented in the info(1) format GNU fdisk User Manual manual.
fdisk 18 August, 2006 CFDISK(8)