If we create a swapfile with fallocate we are told that the file contains holes and therefore the operation is halted.
What are these holes?
Is it unallocated disk space, which makes the whole file ...
So my setup is like this.
$ truncate -s 1T volume
$ losetup -f --show volume
$ mkfs.ext4 /dev/loop0
$ ls -sh volume
$ mount /dev/loop0 /mnt/loop
Now I have a 1.1TB volume, as ...
I want to have a LUKS volume as a loopback device pointing at a sparse file. Lets say I put a 20gb file on it, then later I delete it. How can I zero that area on the device itself so I can fallocate -...