User's Manual

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Storage Overview ....................................................................................................................... 30
Storage Repositories (SRs) ................................................................................................... 30
Virtual Disk Images (VDIs) .................................................................................................... 30
Physical Block Devices (PBDs) .............................................................................................. 30
Virtual Block Devices (VBDs) ................................................................................................ 31
Summary of Storage objects ................................................................................................ 31
Virtual Disk Data Formats .................................................................................................... 31
VHD-based VDIs ........................................................................................................ 32
VHD Chain Coalescing ........................................................................................ 32
Space Utilization ................................................................................................ 32
LUN-based VDIs ........................................................................................................ 33
Storage configuration .................................................................................................................. 33
Creating Storage Repositories ............................................................................................... 33
Upgrading LVM storage from XenServer 5.0 or earlier ................................................................. 34
LVM performance considerations ........................................................................................... 34
VDI types ................................................................................................................. 34
Creating a raw virtual disk using the xe CLI ..................................................................... 34
Converting between VDI formats ........................................................................................... 35
Probing an SR .................................................................................................................. 35
Storage Multipathing ........................................................................................................... 38
Storage Repository Types ............................................................................................................ 39
Local LVM ........................................................................................................................ 40
Creating a local LVM SR (lvm) ....................................................................................... 40
Local EXT3 VHD ................................................................................................................ 40
Creating a local EXT3 SR (ext) ...................................................................................... 40
udev ............................................................................................................................... 41
ISO ................................................................................................................................. 41
EqualLogic ....................................................................................................................... 41