HP XP External Storage Software User Guide (T1706-96018, November 2011)

Contents
1 Overview of connecting external arrays.........................................................7
XP External Storage features.......................................................................................................7
2 Preparing for XP External Storage operations.................................................9
Supported storage platforms and firmware...................................................................................9
Prerequisites.............................................................................................................................9
System requirements..................................................................................................................9
Storage arrays that can be connected as external arrays.........................................................10
XP External Storage requirements..............................................................................................15
Installing XP External Storage...................................................................................................16
Preparing for XP External Storage settings..................................................................................16
External ports....................................................................................................................17
External LU to be mapped...................................................................................................17
External LU groups.............................................................................................................17
External LU attributes set by mapping...................................................................................17
Alternate paths..................................................................................................................19
Example of an alternate path configuration.......................................................................20
Examples of switching I/O execution paths to alternate paths.............................................21
Powering arrays on or off.........................................................................................................25
Commands for Turning On or Off Only an External Array.......................................................25
Powering local arrays on or off............................................................................................26
To power local arrays off................................................................................................26
To power local arrays on................................................................................................26
Powering external arrays on or off........................................................................................26
To power external arrays off...........................................................................................26
To power external arrays on...........................................................................................26
Turning On or Off Power Supply of Both local and external arrays............................................27
Using mapped external LUs from the host connected to the local array...........................................27
Writing new data to mapped external LUs.............................................................................28
Using existing data in mapped external LUs..........................................................................29
Uninstalling XP External Storage...............................................................................................29
Limitations on XP External Storage operations.............................................................................30
Combining XP External Storage with other HP products...............................................................37
Using external LUs for XP Auto LUN operations......................................................................40
Using external LUs for XP Continuous Access operations..........................................................41
Using external LUs for XP Continuous Access Journal operations...............................................42
Using external LUs for XP Business Copy operations................................................................43
Using external LUs for XP Snapshot Software operations..........................................................44
3 Managing cache with external storage........................................................46
Guidelines for using cache with external storage........................................................................46
Determining, setting, or changing the external LU cache mode.....................................................47
Determining if the cache mode is disabled............................................................................47
Changing the cache mode..................................................................................................47
Collecting device information..........................................................................................48
Deleting and remapping the external LU...........................................................................51
Partitioning cache for external storage.......................................................................................51
Determining the number and size of needed partitions................................................................52
Creating cache partitions........................................................................................................52
Changing storage system modes...............................................................................................55
4 XP External Storage panes.........................................................................56
LU Operation pane.................................................................................................................56
Contents 3