What was wrong with LVM snapshots? Performance?
in zfs every write is 'copy on write', so snapshots have 'zero' cost, and
multiple snapshots can use same data.
in LVM every snapshot is standalone and has all the information it needs. also LVM
doesn't have snapshot-based replication, and DRBD+ wasn't opensource/free at that
time either ;-
Though reasons of OpenSolaris vs Solaris are different.
Domas