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Operating Systems Linux Red Hat mounting a copy of a disk without patition table Post 302330553 by dangral on Wednesday 1st of July 2009 03:42:25 PM
Old 07-01-2009
mounting a copy of a disk without patition table

Ok. I screwed up. Using dd, I made a bit-for-bit copy of disk /dev/hda, which contains 3 partitions.

Code:
dd if=/dev/hda of=olddrive.iso bs=2048k

However, I neglected to make a copy of the partition table. I'd like to mount partition 3, /dev/hda3, which is an xfs filesystem, but obviously I don't know where it starts. What can I do?

Thanks.
 

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KPARTX(8)						   Linux Administrator's Manual 						 KPARTX(8)

NAME
kpartx - Create device maps from partition tables SYNOPSIS
kpartx [-a | -d | -l] [-v] wholedisk DESCRIPTION
This tool, derived from util-linux' partx, reads partition tables on specified device and create device maps over partitions segments detected. It is called from hotplug upon device maps creation and deletion. OPTIONS
-a Add partition mappings -r Read-only partition mappings -d Delete partition mappings -u Update partition mappings -l List partition mappings that would be added -a -p set device name-partition number delimiter -f force creation of mappings; overrides 'no_partitions' feature -g force GUID partition table (GPT) -v Operate verbosely -s Sync mode. Don't return until the partitions are created EXAMPLE
To mount all the partitions in a raw disk image: kpartx -av disk.img This will output lines such as: loop3p1 : 0 20964762 /dev/loop3 63 The loop3p1 is the name of a device file under /dev/mapper which you can use to access the partition, for example to fsck it: fsck /dev/mapper/loop3p1 When you're done, you need to remove the devices: kpartx -d disk.img SEE ALSO
multipath(8) multipathd(8) hotplug(8) AUTHORS
This man page was assembled By Patrick Caulfield for the Debian project. From documentation provided by the multipath author Christophe Varoqui, <christophe.varoqui@opensvc.com> and others. July 2006 KPARTX(8)
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