Within the next few hours Apple will released an update to its Xsan software. The release will update Xsan to version 1.3 and will support Fibre Channel Logical Unit Numbers (LUNs) greater than 2TB in size and 7TB Xserve RAID users no longer have to slice their storage and potentially impact storage bandwidth in order to maximize their storage usage.
Apple said the latest release includes fixes for labeling and initializing LUNs greater than 2TB in size; preventing labeled LUNs from becoming unlabeled; improving AFP performance when re-sharing Xsan volumes; more accurate file permissions when sharing Xsan volumes via AFP; accessing Xsan volumes larger than 16 terabytes in size; greater server stability when re-sharing Xsan volumes via NFS; handling quotas with no associated user or group name; maintaining access to Xsan volumes when metadata controller fail-overs occur; providing metadata controller services to 10.3.9 and 10.4 systems running Xsan 1.2; operating Xsan in environments with a mix of 10.3.9 and 10.4 systems; and compatibility with third-party applications and devices.
The update is expected within the next few hours.
[Update 1] - Apple has released numerous updates to Xsan.