I guess the subject line sums it up.
I have OMV living in a 32GB partition on a 250GB SSD, and a backup running weekly to dd the system to a folder on my HDD RAID.
The first few backups (after freshly installing OMV) resulted in image files of 6GB, 11GB, and then 13GB in size. Now they've ballooned to an average of 24-25GB.
This isn't really a problem for me, as I have ample space, but as the actual filesystem usage in OMV is shown to be less than 5GB, I just wonder why the images are so large (especially since they're compressed .gz files). Something to do with unused space on the SSD not being TRIMmed, maybe? Is there something I can do about it?