I think I didn’t make it clear enough: My laptop was on the power during the update process, when the power randomly cut out - for the first time in about 6 years, it doesn’t happen often. Of course you can interpret it as user error - but I think it’s reasonable to update my system when plugged into, normally reliable power. The laptop battery is pretty much dead, so it would’ve shut itself down automatically anyway.
If it was on something like BTRFS it’d probably be fine, though I imagine there’s still a small window where the FS could flush while the file is being written. renameat2 has the EXCHANGE flag to atomically switch 2 files, so if arch maintainers want to fix it they could do
Write to temporary file
Fsync temporary file
Renameat2 EXCHANGE temporary and target
Fsync directory (optional, since a background flush would still be atomic, just might take some time)
Just having btrfs is not enough, you need to have automatic snapshots (or do them manually) before doing updates and configured grub to allow you to rollback.
Personally, I’m to lazy to configure stuff like that, I rather just pick my Vetroy USB from backpack, boot into live image and just fix it (while learning something/new interesting) than spend time preventing something that might never happen to me :)
I think I didn’t make it clear enough: My laptop was on the power during the update process, when the power randomly cut out - for the first time in about 6 years, it doesn’t happen often. Of course you can interpret it as user error - but I think it’s reasonable to update my system when plugged into, normally reliable power. The laptop battery is pretty much dead, so it would’ve shut itself down automatically anyway.
sure, but what os wouldn’t break if you did this?
Plus in Linux you can actually fix this with a live USB, while on Windows you can run startup repair and hope for the best.
In Windows you can also fix this with a live Windows USB, manually.
If it was on something like BTRFS it’d probably be fine, though I imagine there’s still a small window where the FS could flush while the file is being written.
renameat2has the EXCHANGE flag to atomically switch 2 files, so if arch maintainers want to fix it they could doit was btrfs.
Just having btrfs is not enough, you need to have automatic snapshots (or do them manually) before doing updates and configured grub to allow you to rollback.
Personally, I’m to lazy to configure stuff like that, I rather just pick my Vetroy USB from backpack, boot into live image and just fix it (while learning something/new interesting) than spend time preventing something that might never happen to me :)