Apple has just made available XSan 1.0.1 update through its Software Update utility and its support web site. The update weights 2.4MB and provides many bug fixes and improves reliability.

Here are the notes provided by Apple for this update :
The 1.0.1 Update delivers overall improved reliability for Xsan and is recommended for all systems. It includes improvements for:

- using the 'mv' command to move files from Xsan (ACFS) to Mac OS Extended (HFS+) volumes
- saving files over 4GB via SMB/CIFS to an Xsan volume hosted on Mac OS X Server
- greater server stability when resharing Xsan volumes via NFS
- eliminating spontaneous metadata controller failovers that can result in slow file performance

For detailed information on this Update, please visit this website: http: http://www.info.apple.com/kbnum/n301211.