ZFS has gotten significantly better at 80%, but 90% is painful enough that I almost wish it would reserve 10% a bit more explicitly (maybe like the old Unix sys

ZFS has gotten significantly better at 80%, but 90% is painful enough that I almost wish it would reserve 10% a bit more explicitly (maybe like the old Unix systems that would prevent non-root users from using the last 5% of the root partition). All my arrays send me nightly e-mails at 80% so I'm aware of when I hit there, but on a desktop system that's typically not the case.