1

I have several disk images stored at my fileserver at the moment, these are mainly system images created with dd. The reason for why I have created these images is because I needed the harddrive for something else, so I have created a image that I can later restore at the harddrive when it's available.

The problem is that the disk images are pretty size consuming, and there is a lot of free space inside of the images, so is it possible to shrink the images to only contain the actual content of the disk? Let me show you a example, I did mount one of the images to get an example.

Disk.img (500GB)
Disk.imgp1 (Total:1GB/Free:920MB) ext2 /boot
Disk.imgp2 (Total:4GB/Free:4GB) swap swap
Disk.imgp3 (Total:495GB/Free:390GB) ext4 /

As you guys can see, there is lot of free space but still the images takes up 500GB. Is there away to shrink it ~106GB, and then grow it back before restoring it on the harddrive again? Mainly I have images with GPT and DOS tables with EXT and NTFS partitions (Some of the partitions are encrypted with LUKS).

2

This tutorial appears to be what you're looking for. Essentially, you mount the disk image, use GParted to trim it down to size, and then use fdisk to truncate it.

  • 1
    Please edit your post to include the essential steps discussed in the link. :) – Andrea Lazzarotto May 14 '17 at 23:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.