The following restrictions apply to the cluster file system administration:
The unlink(1M) command is not supported on directories that are not empty.
The lockfs -d command is not supported. Use lockfs -n as a workaround.
You cannot remount a cluster file system with the directio mount option added at remount time.
You cannot set the directio mount option on a single file by using the directio ioctl.
ZFS for root file systems is supported, with one significant exception. If you use a dedicated partition of the boot disk for the global-devices file system, you must use only UFS as its file system. The global-devices namespace requires the proxy file system (PxFS) running on a UFS file system. However, a UFS file system for the global-devices namespace can coexist with a ZFS file system for the root (/) file system and other root file systems, for example, /var or /home. Alternatively, if you instead use a lofi device to host the global-devices namespace, there is no limitation on the use of ZFS for root file systems.