ZFS Pool Version 1
This page describes the features available with version 1 of the ZFS pool on-disk format. This is the initial ZFS on-disk format as integrated on 10/31/05. During the next six months of internal use, there were a few on-disk format changes that did not result in a version number change, but resulted in a flag day since earlier versions could not read the newer changes. The first official releases supporting this version are:
- Solaris Express Community Edition, build 36
- Solaris 10 6/06 release
Earlier releases may not support this version, despite being formatted with the same on-disk number. This is due to:
- 6389368 fat zap should use 16k blocks (with backwards compatibility)
- 6390677 version number checking makes upgrades challenging
on 2009/11/02 20:15