Apple has just made available XSan 1.0.1 update through its Software Update utility and its support web site [1]. 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 [2].