Apple has posted an update to Xsan its storage area network file system that lets multiple computers concurrently access terabytes of storage on Xserve RAID over high-speed Fibre Channel.

The company claims the update "delivers overall improved reliability for Xsan". Versions of the update are available for Mac OS X 10.4 Tiger and Mac OS X 10.3.9 Panther.

The Tiger update provides metadata controller services to 10.3.9 and 10.4 systems running Xsan 1.1; enables accessing of Xsan volumes larger than 16 terabyte in size; offers greater server stability when resharing Xsan volumes via NFS; enables handling of quotas with no associated user or group name; maintains access to Xsan volumes when metadata controller failovers occur; and allows operating of Xsan in environments with a mix of 10.3.9 and 10.4 systems.

The Panther update offers greater server stability when resharing Xsan volumes via NFS, it also includes fixes for handling quotas with no associated user or group name, maintaining access to Xsan volumes when metadata controller failovers occur, and operating Xsan in environments with a mix of 10.3.9 and 10.4 systems, states Apple.

An Xsan Admin 1.1 Update update is also available for both flavours of the Mac operating system. This update delivers overall improved reliability for remotely administering, according to Apple.