Solaris 10 What's New

Multiterabyte UFS File Systems

Multiterabyte UFS file system support is available only for systems that run a 64-bit kernel. This feature is new in the Software Express pilot program and in the Solaris 9 8/03 release. This feature is included in the Solaris 10 3/05 release.

The Solaris 10 OS provides support for multiterabyte UFS file systems on systems that run a 64-bit Solaris kernel. Previously, UFS file systems were limited to approximately 1 terabyte (Tbyte) on both 64-bit systems and 32-bit systems. All UFS file system commands and utilities have been updated to support multiterabyte UFS file systems.

You can initially create a UFS file system that is less than one Tbyte. You can specify that the file system can eventually be grown to a multiterabyte file system by using the newfs -T command. This command sets the inode and fragment density to scale appropriately for a multiterabyte file system.

Support for a multiterabyte UFS file system assumes the availability of multiterabyte LUNs. These LUNS are provided as Solaris Volume Manager volumes, or as physical disks that are greater than one Tbyte.

Features of multiterabyte UFS file systems include the following:

Limitations of multiterabyte UFS file systems include the following:

For more information, see “What’s New in File Systems in the Solaris 10 Release?” in the System Administration Guide: Devices and File Systems.