2 ms·
It's like booting off a CD-ROM every time. User files are overlaid over the boot image. Installing updates creates a new image from which to reboot. Old images
by speed_spread 4y ago
It's like booting off a CD-ROM every time. User files are overlaid over the boot image. Installing updates creates a new image from which to reboot. Old images are kept in case of failed update. Prevents some hacking too.