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Storage Overview ............................................................................................................. 34
Storage Repositories (SRs) ......................................................................................... 34
Virtual Disk Images (VDIs) ......................................................................................... 34
Physical Block Devices (PBDs) .................................................................................... 34
Virtual Block Devices (VBDs) ..................................................................................... 35
Summary of Storage objects ..................................................................................... 35
Virtual Disk Data Formats ......................................................................................... 35
VHD-based VDIs ............................................................................................... 35
VHD Chain Coalescing ............................................................................... 36
Space Utilization ....................................................................................... 36
LUN-based VDIs ................................................................................................ 36
Storage Repository Types .................................................................................................. 37
Local LVM ................................................................................................................. 37
Creating a Local LVM SR (lvm) ........................................................................... 38
Local EXT3 VHD ........................................................................................................ 38
Creating a Local EXT3 SR (ext) ........................................................................... 38
udev ........................................................................................................................ 38
ISO ........................................................................................................................... 38
Software iSCSI Support ............................................................................................. 39
XenServer Host iSCSI configuration .................................................................... 39
Citrix StorageLink SRs ................................................................................................ 39
Upgrading XenServer with StorageLink SRs ......................................................... 40
Creating a Shared StorageLink SR ...................................................................... 40
Managing Hardware Host Bus Adapters (HBAs) .......................................................... 44
Sample QLogic iSCSI HBA setup ......................................................................... 44
Removing HBA-based SAS, FC or iSCSI Device Entries .......................................... 45
LVM over iSCSI ......................................................................................................... 45
Creating a Shared LVM Over iSCSI SR Using the Software iSCSI Initiator
(lvmoiscsi) ........................................................................................................ 45
Creating a Shared LVM over Fibre Channel / iSCSI HBA or SAS SR (lvmohba) .......... 46
NFS VHD .................................................................................................................. 48
Creating a Shared NFS SR (NFS) ......................................................................... 49