The ZFS File System

The following file system enhancements are new in the Solaris Express 7/06 release.

• ZFS Double Parity RAID - ZFS pools can be created using double parity RAID known as “raidz2”. Each raidz2 stripe within the pool can sustain up to two simultaneous failures without losing data.

  For more information, see the zpool(1M) man page.

• ZFS Clone Promotion - ZFS clones can be “promoted” to the active head of the original file system from which the snapshot was taken. The ZFS clone promotion feature enables the original file system and the snapshot to be deleted while preserving the clone as an active file system. In releases prior to Solaris Express 7/06, a snapshot could not be deleted while the clone still existed.

  For more information, see the zfs(1M) man page.

• ZFS Hot-Spare Support - ZFS supports the use of hot-spares within a pool. A device within a pool fails when it is removed from the system. The failed device will be automatically replaced by an available hot-spare. When the original failed device is usable again, the spare device is returned to the pool of available hot-spares.

  For more information, see the zpool(1M) man page.

For more information about the ZFS file system, see ZFS Command Improvements and Changes.