How to mount ISO in solaris & resolve error (iso is not a multiple of 512)

Many software packages download are in the form of an ISO image. Rather than burning the image to a CD-ROM to access its contents, it is easy to mount the image directly into the Solaris file-system using the lofiadm and mount commands.

Given an ISO image in /export/temp/Compusoft.iso, a loopback file device (/dev/lofi/1) is created with the following command:

#lofiadm -a /export/temp/Compusoft.iso

Output

    /dev/lofi/1

The lofi device creates a block device version of a file. This block device can be mounted to /mnt with the following command:

#mount -F hsfs -o ro /dev/lofi/1 /mnt

These commands can be combined into a single command:

#mount -F hsfs -o ro `lofiadm -a /export/temp/Compusoft.iso` /mnt

Sometimes when you convert image from .nrg to .iso & converted image is not a multiple of 512 bytes. lofiadm refuses.

Unmount and detach the images

Use umount command to unmount image:

#umount /mnt

Now remove/free block device:

#lofiadm -d /dev/lofi/1

Error:

# lofiadm -a  /export/temp/Compusoft.iso  

lofiadm: size of  /export/temp/Compusoft.iso  is not a multiple of 512

Solution:

# cd /export/temp

# dd if=./Compusoft.iso of=./Compusoftnew.iso obs=512 conv=sync
# lofiadm -a  /export/temp/Compusoftnew.iso 
/dev/lofi/1
# mount -F hsfs -o ro /dev/lofi/1 /mnt