Diemazz

Xsan

Developed by	Apple Inc.
Initial release	2005, 3–4 years ago
Latest release	2.1.1
OS	Mac OS X
Type	Shared disk file system
License	Proprietary
Website	www.apple.com/xsan

Xsan is Apple Inc.'s shared disk file system for Mac OS X. Xsan enables multiple Mac desktop and Xserve systems to access shared block storage over a FibreChannel network. With the Xsan file system installed, these computers can read and write to the same storage volume at the same time. Xsan is a complete SAN solution which includes the metadata controller software, the file system client software, and integrated setup, management and monitoring tools.

Interoperability

Xsan is based on the StorNext File System. ^[1]

The Xsan website claims complete interoperability ^[2] with the Quantum StorNext File System: And because Xsan is completely interoperable with Quantum’s StorNext File System, you can even provide clients on Windows, Linux, and other UNIX platforms with direct Fibre Channel block-level access to the data in your Xsan-managed storage pool. ^[3]

Quantum claims Complete interoperability with Apple’s Xsan and Promise RAID and Allows Xsan and Xserve RAID to support AIX, HP-UX, IRIX, Red Hat Linux, SuSE Linux, Mac OS X, Solaris, and Windows clients, including support for 64 Bit Windows and Windows Vista. ^[4]

This means that the StorNext File System and the Xsan file system must share the same file system layout and the same protocol when talking to the meta data server. They also seem to share a common code base or very close development based on the new features developed for both file systems.

History

Box artwork for Xsan versions 1.0-1.4.

On 4 January 2005, Apple annouced shipping of Xsan. ^[5]

In May 2006, Apple released Xsan 1.2 with support for volume sizes of nearly 2 petabytes.

On 7 August 2006, Apple announced Xsan 1.4, which is available for Intel-based Macintosh computers as a Universal binary and supports file system access control lists.

On 5 December 2006, Apple released Xsan 1.4.1.

On 18 October 2007, Apple released Xsan 1.4.2, which resolves several reliability and compatibility issues.

On 19 February 2008, Apple released Xsan 2, the first major update which introduces MultiSAN, and completely redesigned administration tools. ^[6] 2.1 was introduced in June 10, 2008. 2.1.1 was introduced on October 15, 2008.

References

1. ^ "Xsan Introduction".
2. ^ "Apple Introduces Xsan Storage Area Network File System". Apple Inc..
3. ^ "Xsan 2 for traditional IT services".
4. ^ "StorNext FX and FX2".
5. ^ "Apple Ships Xsan Storage Area Network File System". Apple Inc..
6. ^ Info-Mac: View Topic - Apple Introduces Xsan 2

External links

• Apple's Xsan page

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