Software User Manual
Table Of Contents
- HP StorageWorks External Storage XP user guide
- Contents
- About this guide
- 1 Overview of connecting external arrays
- 2 Preparing for External Storage XP operations
- System requirements
- External Storage XP requirements
- Installing External Storage XP
- Preparing for External Storage XP settings
- Powering arrays on or off
- Using mapped external LUs from the host connected to the local array
- Uninstalling External Storage XP
- Limitations on External Storage XP operations
- Figure 11 Example of external LU with 2 TB or less
- Figure 12 External LU capacity is larger than the specified emulation type’s basic capacity (OPEN-3 example)
- Figure 13 External LU capacity is smaller than the specified emulation type’s basic capacity
- Table 4 When external LU’s emulation type is OPEN
- Table 5 When external LU’s emulation type is for mainframes
- Combining External Storage XP with other HP StorageWorks products
- 3 Managing cache with external storage
- Guidelines for using cache with external storage
- Determining, setting, or changing the external LU cache mode
- Partitioning cache for external storage
- Determining the number and size of needed partitions
- Creating Cache partitions
- Changing storage system modes
- 4 External Storage XP panes
- 5 Configuring external LUs
- Overview of configuring external LUs
- Setting an external array’s port
- Setting a local array’s port attributes
- Mapping external LUs (Add LU)
- Setting alternate paths for external LUs
- Adding alternate paths by selecting multiple external LUs (Add Paths)
- Deleting alternate paths by selecting multiple external LUs (Delete Paths)
- Checking an external LU’s status (LDEV Information)
- Disconnecting external arrays or LUs
- Checking the connection status and resuming external LU operations (Check Paths & Restore Vol.)
- Restoring external LUs (LDEV Restore)
- Stopping the use of paths to an external LU by specifying an external array’s WWN (Disconnect Paths)
- Restoring paths to an external LU by specifying an external array’s WWN (Check Paths)
- Changing an external array’s port setting
- Stopping the use of paths to an external LU by specifying a local array’s port (Disconnect Paths)
- Restoring paths to an external LU by specifying a local array’s port (Check Paths)
- Deleting external LU mappings (Delete LU)
- 6 Troubleshooting NAS Blade systems that include external arrays
- 7 Remote command devices
- 8 Troubleshooting External Storage XP
- A Notes on connecting external arrays
- Connecting Thunder 9500V subsystems
- System parameters for connecting Thunder 9500V subsystems
- Relationship between serial numbers in the Device list on the LU Operation pane and Thunder 9500V subsystem models
- Relationship between the WWN of the port on the Thunder 9500V subsystem and the controller
- Path status and examples of recovery procedures (Thunder 9500V subsystems)
- Connecting TagmaStore AMS and TagmaStore WMS subsystems
- System parameters for connecting TagmaStore AMS and TagmaStore WMS subsystems
- Relationship between serial numbers in the Device list on the LU Operation pane and TagmaStore AMS and TagmaStore WMS subsystem models
- Relationship between the WWN of the port on the TagmaStore AMS or TagmaStore WMS subsystem and the controller
- Path status and examples of recovery procedures (TagmaStore AMS and TagmaStore WMS subsystems)
- Connecting XP12000/XP10000 Disk Arrays
- Connecting XP1024/XP128 Disk Arrays
- Connecting XP512/XP48 Disk Arrays
- Connecting HP 200 Storage Virtualization System as external storage
- Connecting EVA arrays
- Connecting Thunder 9500V subsystems
- B Required volume capacity for emulation types
- C Adjusting volume capacity for copy pair setting
- D Using an XP12000/XP10000/SVS200 with an EVA3000/5000 external storage
- E Configuring MSA1000/1500 as external arrays
- Index
28 Preparing for External Storage XP operations
This command checks if defined information about the mapped external LU and the actual external LU
status match. If the external LU can be used as the mapped local array volume, the external LU is set to
accept I/O, and you can continue using the external LU as a mapped LU.
Use this command to restore the external LU, which is set to reject host I/O operations by the
Disconnect Subsystem or Disconnect Volume command, as the mapped volume. You can execute the
Check Paths & Restore Vol. command for the entire array or an individual LU.
If an error occurs in the external storage path such that the command fails, correct the error so the path
can be restored, and execute the Check Paths & Restore Vol. command again.
For instructions, see ”Checking the connection status and resuming external LU operations (Check
Paths & Restore Vol.)” on page 100.
NOTE: When executing the Check Paths & Restore Vol. command, if the external LU is ready to be
restored as the mapped LU, the external LU is set to Available. However, if the external LU is not
ready to be restored, the external LU status remains as Blocked.
The following sections describe procedures to power the local and external arrays on or off.
CAUTION: To power both the local and external arrays off, first power off the local array, and then power
off the external array.
CAUTION: To power both the local and external arrays on, first power on the external array, and then
power on the local array. If both are supplied by a common failed power source, one option to ensure that
the external array is online and available before the XP powers up is to place the external array on an
Uninterruptible Power Supply (UPS).
Powering local arrays on or off
To power local arrays off
1. Stop read and write I/Os to the external LU that is mapped as a local array internal LDEV.
2. Perform other operations required before powering the local array off.
3. Turn the local array’s power off.
NOTE: As you turn the local array’s power off, all data for the external LU in the local array’s cache
memory is written in the external LU (all data is destaged).
To power local arrays on
1. Power on the external array containing the external LU mapped as a local array internal LDEV.
2. Turn on the local array’s power.
CAUTION: When the local array is powered off after executing the Disconnect Subsystem command,
you cannot access the mapped external LU from the local array when you first power on the local array.
You must execute the Check Paths & Restore Vol. command to resume using the mapped external LU. The
Check Paths & Restore Vol. command checks if the defined information and actual status of the external LU
mapped as a local array volume match. If the external LU is ready to be used as a mapped volume, the LU
is set to accept I/Os and you can resume using the volume as a mapped volume.