HP StorageWorks External Storage XP user guide (T1706-96006, June 2006)
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
External Storage XP user guide 49
5. Click OK in response to the warning message.
6. Click OK.
7. Remap the LU using all the previous settings except for the cache mode setting, which is disabled. See
”Mapping external LUs (Add LU)” on page 73.
NOTE: When scanning for devices to add, the order in which devices are discovered might be
different. The UUID is always the same for the same external device. Ensure that the UUID of the
device being remapped matches the UUID that was deleted for the same LU number.
8. Recheck to ensure that the same external storage LUs (identified by UUIDs) are now assigned their
original settings and the desired cache mode. If not, delete and remap the external LU again.
Partitioning cache for external storage
Separate cache partitions isolate the applications that are using XP arrays and storage virtualization
systems from the I/O dampening effects of a cache that is filling up with host and internal I/O for slower
external targets. HP requires separate cache partitions (CLPRs) for:
• External volumes and internal XP volumes, except for configurations where all external storage LUNs
have cache disabled and do not have any external storage devices using data mirroring or migration
products
NOTE: All HP 200 Storage Virtualization System volumes are external. Partition SVS200 cache
according to the other recommendations made in this section.
• External volumes that are used by XP data replication or data migration products, including Business
Copy XP, Continuous Access XP software products, Snapshot XP, Auto LUN XP, and XP Tiered Storage
Manager
• SVS200 source volumes and data copy or target volumes that have slower throughput
For example, Company A uses:
• XP10000 internal disks for database applications
• EVA3000 for backup applications
Cache can be partitioned for Company A as follows:
• CLPR0: XP10000 for Business Copy XP P-VOL
• CLPR1: EVA3000 for Business Copy XP S0VOL (external LU cache is disabled)
In another example, Company B uses the following storage tiers:
• Tier 1 is an XP12000 (6 TB of internal space) for P-VOLs
• Tier 2 is an EVA (20 TB) for P-VOLs and Business Copy XP S-VOLs
• Tier 3 is two MSA 1500 (10 TB) for the Business Copy XP S-VOLs
Cache can be partitioned for Company B as follows:
• CLPR0: 12 GB for the internal XP12000 P-VOL
• CLPR1: 4 GB for the EVA S-VOL and P-VOL
• CLPR2: 4 GB for the MSA S-VOL
• All external LU cache is disabled.
To partition cache for external storage:
1. Determine the number and size of the partitions you need (see page 50).
2. Create the partitions (see page 50).