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Full Discussion: Access a File as a Device?
Top Forums UNIX for Advanced & Expert Users Access a File as a Device? Post 302609669 by Matt Miller on Tuesday 20th of March 2012 09:27:03 AM
Old 03-20-2012
Quote:
Originally Posted by Peasant
use mount's offset option.
...
parted ... ran against full image (to get information about it)
That sounds promising. So:

Code:
# losetup /dev/loop0 /path/to/dev_sda.17-Mar-2012
# parted /dev/loop0     
...
(parted) p                                                                
Model:  (file)
Disk /dev/loop0: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  16.0GB  16.0GB  primary   ext4            boot
 2      16.0GB  320GB   304GB   extended
 5      16.0GB  80.0GB  64.0GB  logical   ext4
 6      80.0GB  144GB   64.0GB  logical   ext4
 7      144GB   160GB   16.0GB  logical   linux-swap(v1)
 8      160GB   176GB   16.0GB  logical   ext4
 9      176GB   320GB   144GB   logical   ext4

Now, I guess I just can't get the offset right. Trying to mount partition number 5:

Code:
# losetup -o 16GB /dev/loop1 /path/to/dev_sda.17-Mar-2012
# mount /dev/loop1 /mnt                                                                               
NTFS signature is missing.
Failed to mount '/dev/loop1': Invalid argument
The device '/dev/loop1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?

I've tried "16GiB" and "16G" also.
 

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