Difference between revisions of "Mounting Disk Images"

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m (kpartx)
m (kpartx)
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     rawimage.dd5              2          2        8001  83  Linux
 
     rawimage.dd5              2          2        8001  83  Linux
  
creates the command
+
The command
  
 
  #  kpartx -v -a rawimage.dd
 
  #  kpartx -v -a rawimage.dd
  
this mappings
+
creates these mappings
  
 
     /dev/mapper/loop0p1
 
     /dev/mapper/loop0p1
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     /dev/mapper/loop0p5
 
     /dev/mapper/loop0p5
  
The Partitions can now mount easy with  
+
The partitions can be mounted with these commands:
  
 
  # mount /dev/mapper/loop0p1 /media/suspectHD_01/ -o ro
 
  # mount /dev/mapper/loop0p1 /media/suspectHD_01/ -o ro

Revision as of 07:15, 4 November 2009

Contents

FreeBSD

To mount a disk image on FreeBSD:

First attach the image to unit #1:

 # mdconfig -a -t vnode -f /big3/project/images/img/67.img -u 1

Then mount:

 # mount -t msdos /dev/md1s1 /mnt
 # ls /mnt
 BOOTLOG.PRV     BOOTLOG.TXT     COMMAND.COM     IO.SYS          MSDOS.SYS

To unmount:

 # umount /mnt
 # mdconfig -d -u 1

To mount the image read-only, use:

 # mdconfig -o readonly -a -t vnode -f /big3/project/images/img/67.img -u 1
 # mount -o ro -t msdos /dev/md1s1 /mnt

Linux

To mount a disk image on Linux

# mount -t vfat -o loop,ro,noexec img.dd /mnt

The ro is for read-only.

This will mount NSRL ISOs:

 # mount /home/simsong/RDS_218_A.iso /mnt/nsrl -t iso9660 -o loop,ro,noexec 

Some raw images contains multiple partitions (e.g. full HD image). In this case, it's necessary to specify a starting offset for each partition.

# mount -t vfat -o loop,offset=32256,ro,noexec img.dd /mnt/tmp_1
# mount -t vfat -o loop,offset=20974464000,ro,noexec img.dd /mnt/tmp_2

kpartx

Mounting raw images with multiple partitions is easy with kpartx. Type aptitude install kpartx as root to install kpartx under Debian. kpartx is creating device-mappings for each partition. If the raw image looks like this:

       Device        Boot      Start       End      Blocks Id  System
    rawimage.dd1               1           1        8001   83  Linux
    rawimage.dd2               2           2        8032+   5  Extended
    rawimage.dd5               2           2        8001   83  Linux

The command

#   kpartx -v -a rawimage.dd

creates these mappings

   /dev/mapper/loop0p1
   /dev/mapper/loop0p2
   /dev/mapper/loop0p5

The partitions can be mounted with these commands:

# mount /dev/mapper/loop0p1 /media/suspectHD_01/ -o ro
# mount /dev/mapper/loop0p5 /media/suspectHD_02/ -o ro

Don't forget the switch -o ro !

To unmount

# umount /mnt

Mounting Images Using Alternate Superblocks