Iso/dd image mounting howto - Revision history

Paulm: /* Howto to mount an dd/iso image */

2013-04-04T19:46:19Z

Howto to mount an dd/iso image

Paulm at 19:45, 4 April 2013

2013-04-04T19:45:14Z

Paulm: Created page with "= Howto to mount an dd/iso image = When disk fail/start failing it is sometimes necessary to create a backup of the hard drive using ddrescue (see ddrescue howto). This create…"

2013-04-04T19:44:15Z

Created page with "= Howto to mount an dd/iso image = When disk fail/start failing it is sometimes necessary to create a backup of the hard drive using ddrescue (see ddrescue howto). This create…"

New page

= Howto to mount an dd/iso image =

When disk fail/start failing it is sometimes necessary to create a backup of the hard drive using ddrescue (see ddrescue howto). This creates a bit for bit copy of the disk/file system.

To read the image you mount it via loopback

<code>sudo mount -o,loop image.dd /mnt/point</code>

you might need to specify the file system e.g.

<code>sudo mount -o,loop -t ntfs image.dd /mnt/point</code>

If this complains about not being able to find a file system it might be that a copy was made of an entire disc rather than partitions with in it.

In this run the command <code>mmls</code> -- this will output the partition table of the disk. Look up the number of the partition user the Start column.

This is a number expressed in blocks. Typically a block is 512 bytes so multiple this number by 512 to get the offset.

<code>sudo mount -o,loop,offset=[number] image.dd /mnt/point</code>

e.g. <code>sudo mount -o,loop,offset=1048576 image.dd /mnt/point</code>

You can also do e.g.:

<code>sudo mount -o,loop,offset=$(2048 * 512 | bc) image.dd /mnt/point</code>

In this case <code>$(2048 * 512 | bc)</code> is doing the multiplication for you.

This technique also works with iso images.

For use with Macs, and more setails om <code>mmls</code> see:[[Mac Backup Notes]]

← Older revision		Revision as of 19:46, 4 April 2013
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−	When disk fail/start failing it is sometimes necessary to create a backup of the hard drive using ddrescue (see ddrescue ~~howto~~). This creates a bit for bit copy of the disk/file system.	+	When disk fail/start failing it is sometimes necessary to create a backup of the hard drive using ddrescue (see [[ddrescue]]). This creates a bit for bit copy of the disk/file system.

	To read the image you mount it via loopback		To read the image you mount it via loopback

← Older revision		Revision as of 19:45, 4 April 2013
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−	= Howto to mount an dd/iso image =	+	== Howto to mount an dd/iso image ==


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−	For use with Macs, and more ~~setails om~~ <code>mmls</code> see:[[Mac Backup Notes]]	+	For use with Macs, and more details on <code>mmls</code> see:[[Mac Backup Notes]]