LinuxQuestions.org - How do I properly mount a DMG file on ubuntu?

Hi! :)

I have a decrypted DMG file and want to mount it on /mnt/ramdisk. I ran file on it and it shows as it should:

Code:

# file ramdisk.dmg

ramdisk.dmg: Macintosh HFS Extended version 4 data last mounted by: '10.0', created: Tue Nov 16 23:25:47 2010, last modified: Wed Nov 17 01:29:16 2010, last checked: Tue Nov 16 23:25:47 2010, block size: 4096, number of blocks: 4272, free blocks: 429

So I tried to use losetup:

Code:

# losetup /dev/loop0 ramdisk.dmg

losetup: /dev/loop0: device is busy

What's wrong with that? Tried to mount anyway:

Code:

# mount -t hfsplus -o loop ramdisk.dmg /mnt/ramdisk

mount: wrong fs type, bad option, bad superblock on /dev/loop1,

      missing codepage or helper program, or other error

      In some cases useful info is found in syslog - try

      dmesg | tail  or so

Tail shows:

Code:

# dmesg | tail -n 2

[ 9830.638694] hfs: invalid secondary volume header

[ 9830.638705] hfs: unable to find HFS+ superblock

The command losetup sets up the loop device for mounting so what I now did:

Code:

# losetup /dev/loop0 ramdisk.dmg

# mount /dev/loop0 /mnt/ramdisk

mount: wrong fs type, bad option, bad superblock on /dev/loop1,

      missing codepage or helper program, or other error

      In some cases useful info is found in syslog - try

      dmesg | tail  or so

# dmesg | tail -n 2

[ 196.954927 ] hfs: invalid secondary volume header

[ 196.954927 ] hfs: unable to find HFS+ superblock

Now we have a new error. Any fix or way around?