Citrix release today the first update for XenServer 5.5 : Changes included in this update LVHD Snapshots When LVHD snapshots are deleted, disk space is reclaimed by freeing unused snapshot data. This is provided automatically by XenServer while VMs continue to run. However, there is a known limitation in the 5.5 implementation of this feature: when all snapshots are deleted for a given VM?s disks, some disk space allocated to these snapshots may remain. To address this limitation, Update 1 includes an 'Off-line Coalesce' tool that can reclaim all disk space previously allocated to deleted snapshots while the VM is temporarily set offline. The Off-line Coalesce tool and its use are described in full in an associated KB article: CTX123400. XenCenter Improvements CA-30569, CA-32164, CA-30200 Fixed various 'Application Errors' in XenCenter.   CA-32241 XenCenter saved searches are now visible under 'Apply Saved search' and 'Delete saved search' options.   CA-33918 Big improvements to XenCenter performance when connecting to multiple pools.     Storage CA-30577 Snapshot errors after upgrade from 5.0 to 5.5. Previously released as hotfix XS55E001 and documented in KB article CTX122142.   CA-24607 When multipathing is disabled, then this information is now correctly displayed in XenCenter.   CA-31159 The XenCenter New Storage Wizard now works as expected when multipath is enabled.   CA-30475 Legacy LVM VDIs (created on versions of XenServer prior to 5.5) greater than 2TB in size now work after upgrade to 5.5 as expected.   CA-33256 The multipath path-checker has been improved for Pillar Data arrays to make it more resilient to transient path failures.   CA-30549 Importing VMs preserves sparseness where possible.   CA-30049 When taking a snapshot of a legacy LVM VDI (created with a previous version of XenCenter) and then deleting this snapshot, then the deleted snapshot is now coalesced into the LVM VDI to reclaim space as expected.   CA-30757 SR.scan on NetApp SRs inadvertently caused snapshots created externally to XenServer (e.g. those created using a utility like SnapMirror) to be deleted. This caused utilities such as SnapMirror to fail when used with the NetApp SR. This issue is now fixed: SR.scan will only remove snapshots created by XenServer. As a result utilities such as SnapMirror will work as expected.   CA-29367 SRs with non-ASCII characters in their names now work as expected.   Active Directory Improvements CA-32857 Memory leak in dom0 components used to manage Active Directory integration fixed.  …