Two years or so tried fedora Silverblue and one the main issue i run into was storage. I had 180 GB SSD at the time and it filled to 90-something in a week. Now i have a 240 GB SSD and thing of try an immutable distro but worried about the storage space.
Anyone got insight into how big an SSD do i need?
Simplest put, a fedora immutable usually keeps two images, the one you’ll boot into next reboot, and the one you’re running. If a rpm-ostree update hasn’t been run it’ll be the one you’re running and the last one. My bazzite (heavier than silverblue I guess) images are ~ 14Gb, you need room for three (the two you’re using and room for downloading the next) plus 3% of your hard drive because fedora says so, so 3*14 = 42 + .03 * 240 = 42 + 7.2 = 49.2 =~ 50Gb.
Wait a sec, when I actually do a
sudo du -sh /sysroot/ostree/deploy/fedora/deploy/*I get 14Gb for my previous one and 2.1Gb for my current one, so there’s some diff black magic fuckery (ostree chunking) going on, which makes sense because it’s not taking that long to download. So 50Gb would be super safe, you might get away with 25 depending on how different the two images are (i.e. how much has been updated), but updating to the next major fedora version (e.g. 42->43) would be iffy.
Upshot is, it shouldn’t have filled to 90-something in the first place (maybe before ostree chunking, but even then), but if you end up with a lot of entries in your GRUB they’re all taking a notable chunk of space and you’ll need to purge some.