Apple has released a pair of updates for its Xsan software.

Xsan is Apple's enterprise-class storage area network (SAN) solution that lets multiple computers concurrently access terabytes — even petabytes — of storage on Xserve RAID over high-speed Fibre Channel.

Two updates have been made available: the Xsan 1.4.1 FIlesystem Update and the Xsan 1.4.1 Admin Update.

The Filesystem Update addresses numerous issues related to overall reliability, usability and compatibility. Specific fixes within the 16MB download (according to Apple) include:

- metadata controller failovers during power outages and network disconnects
- memory related errors that can result in slow system performance or hangs
- reducing fragmentation of large files and frame drops during ingest
- preventing file system metadata corruption
- hosting Xsan volumes on Intel-based metadata controllers
- defragmenting files after a volume bandwidth expansion
- compatibility with Apple and third party applications

The 9.2MB Admin Update is described as offering improved reliability for remotely administering, configuring and maintaining Xsan deployments. It includes fixes for:

- labeling and initialising Fibre Channel LUNs (logical unit number) larger than 2TB in size
- expanding storage pools and volumes
- working with multiple Xsan metadata controllers in a heterogeneous environment
- displaying progress messages while performing lengthy operations
- preventing custom configuration changes from being overwritten during a save
- accurately reporting Fibre Channel multipathing errors