Hp XP External Storage Software Bedienungsanleitung

HP StorageWorksExternal Storage XP user guide for theXP12000, XP10000, SVS200Part number: T1706-96010Ninth edition: November 2007

Tables..Document conventions ... 121..Storage arrays that ca

CAUTION:If the specified number of alternate paths cannot be set, an error appears in the Preset list.• CLPR (see External LU attributes set by mappin

Select LDEV windowFigure 49 Select LDEV window• CU listCU number of the local array to which you want to map the external LU.• IntervalInterval of the

Closes the Select LDEV window, and returns to the Auto Map Setting window. On the Auto MapSetting window, the CU:LDEV number you selected on the Selec

• If the SSID setting is not necessary, the LU Operation pane appears. Settings appear in blueitalics in the Device tree and Device list. The contents

Figure 50 VMA Information pane• VendorExternal array's vendor.• ProductExternal array's product name.• LUNLU number of the external LU.• Att

• ExtentIndicates whether extents are set.• Asterisk (*): Extents are set.• Hyphen (-): Extents are not set.• Used VolumesLicensed capacity for LUN Se

Figure 51 Path Setting window• VendorExternal array's vendor.• ProductExternal array's product name.• SerialExternal array's serial num

DescriptionIconPort in Standard mode.Port in Initiator/External MIX mode.• WWN: External array port's identification number.• LUN: LU number of t

• I/O TOV: Time over value for I/O to the external LU• Qdepth: Number of Read/Write commands that can be issued (queued) to an external LU atone time•

The alternate path defined in the Path Setting window is applied to the local array, and thespecified contents appear in the Device list.If errors occ

About this guideThis document provides information about:• Preparing for External Storage XP operations• Performing External Storage XP operations• Tr

Figure 52 Path Setting window, shortcut menu6. Repeat the Priority Up command until the row of the selected path is displayed on the first lineof the

Changing alternate pathsTo change an alternate path, cancel the current alternate path, and then define another path as anew alternate path.CAUTION:Yo

Figure 53 Overview of Operation to Replace All the Current Alternate Paths with Newly-added AlternatePathsTo replace all the current alternate paths (

2. Disconnect the cable which the alternate path A uses, and connect the cable which the alternatepath C uses.3. Cancel the configuration of the alter

Figure 54 Add Paths window• PortLocal array ports. After selecting a port, you can add paths. One of the following icons appearsfor each port:Port in

5. In the Unselected Paths list, select the port's WWNs, and click Set. The selected WWNs moveto Selected Paths.6. Click OK. The Path Setting win

Figure 55 Delete Paths window• PortLocal array ports. After selecting a port, you can add the paths. One of the following icons appearsfor each port:D

4. In the Port list, select the local array port. External array ports (WWNs) that have been configuredwith paths connecting to the local array port a

Figure 56 LDEV Information window• VendorExternal array's vendor.• ProductExternal array's product name.• SerialExternal array's produc

• Path: Number of set paths.• Emulation Type: External LU's emulation type set when it was mapped.• Capacity: External LU's capacity.• Statu

• HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200• HP StorageWorks Cache LUN XP user guide for XP12000/XP10000/SVS200• HP S

1. Select the LU Operation tab. The LU Operation pane appears.2. In the Device tree, select the external LU group number. Information about the extern

Figure 58 Volume Detail windowYou can also check the LDEVs making up a LUSE volume by selecting View all Volumes at the bottomof the LDEV Information

CAUTION:Note the following for the Disconnect Subsystem and Disconnect Volume commands:• After executing the Disconnect Subsystem or Disconnect Volume

Figure 59 Disconnect Subsystem and Check Paths & Restore Vol. CommandsThe selected external array appears in blue italics in the LU list and Devic

3. Click Apply. A confirmation message appears.4. Click OK. The Ex-Dev.Status column in the Device list changes to Cache Destaging. When ExternalStora

2. In the Device list, right-click the external array you want to restore the connection to the localarray, and select Check Paths & Restore Vol.

Restoring volumes in an external array1. In the LU Operation pane, select External Devices in the Device tree. Connected external arraysappear in the

• Whether the LU is part of a LUSE. When it constitutes a part of a LUSE, the cache mode settingshould be same among all LUs which constitute the LUSE

4. Click the LU Operation tab. The LU Operation pane is displayed.5. Click an external LU group number in the Device tree. The information on the exte

Restoring paths to an external LU by specifying an externalarray's WWN (Check Paths)To restore the path between the local array and external arra

NOTE:Provides additional information.TIP:Provides helpful hints and shortcuts.HP technical supportTelephone numbers for worldwide technical support ar

Figure 60 Change Parameter pane• IO TOV (10-240): Timeout value for the I/O to the external LU. The value can be 10 to 240 (insecond). The default val

8. Click OK.Stopping the use of paths to an external LU by specifying alocal array's port (Disconnect Paths)To stop using the path between the lo

Deleting external LU mappings (Delete LU)You can start deleting external LU mappings from the LU Operation pane. To delete the external LUmapping, sel

NOTE:If you click OK in response to the warning, the Delete LU operation is performed, but datain the local array cache memory that is not yet written

Configuring external LUs134

6 Troubleshooting NAS Blade systems thatinclude external arraysIf your local array is provided with a NAS package, you can configure the NAS Blade sys

Figure 61 Example of a NAS Blade system configuration that includes an external arrayCAUTION:To stop the external array, execute the procedure accordi

Restarting external arrays and restoring NAS Blade systems1. Turn the external array power supply on. For instructions, see Topowerexternalarrayson.2.

Figure 62 Error in an external array's disk1. Delete all Business Copy XP or Continuous Access XP pairs, if you created pairs.2. Perform the foll

11. Restart NAS OS 2 (NAS channel adapter's OS) using LUN Manager or NAS Blade Manager.12. Start node 2 using NAS Blade Manager.13. Perform one o

About this guide14

Figure 63 Error in a path to the external array1. Restore (for example, check the cable's connection status or change the switch) the status of t

When resource group 2's status is Online, change resource group 2's execution node tonode 2 (failback).•• When resource group 2's statu

Figure 64 Error occurs on the path to the external array used for node 11. Restore (for example, check the cable's connection status or change th

the local array and external array. In this case, if an error occurs in the only set path, none of thevolumes in the external array can be used.NOTE:I

6. Start the cluster using NAS Blade Manager.7. Start resource group 1 and resource group 2 using NAS Blade Manager.Troubleshooting NAS Blade systems

7 Remote command devicesThis chapter describes remote command devices.Overview of remote command devicesA remote command device is a device in the loc

Figure 66 Overview of remote command deviceNotices about remote command devices• You can map command devices as remote command devices when one of the

• You do not need a license for External Storage XP or Flex Copy XP to map command devices asremote command devices.• Remote command devices are displ

NOTE:The device name reported to the host is the same as the one displayed in the Device columnof the Device list. For the device names reported to th

NOTE:Command devices that can be mapped as remote command devices are displayed on External StorageXP's panes as shown in Table 10.When you selec

1 Overview of connecting external arraysExternal Storage XP realizes the virtualization of storage arrays. You can use External Storage XP toaccess mu

Figure 67 Difference between Standard and Initiator/External MIX modesFigure 68 shows an example of using Continuous Access XP or Continuous Access XP

Figure 68 Using Continuous Access XP or Continuous Access XP Journal with remote command devicesUsing Initiator/External MIX modeThis section describe

5. Start the Continuous Access XP or Continuous Access XP Journal operation and the remotecommand device operation using the port of the Initiator/Ext

8 Troubleshooting External Storage XPIf you have a problem with the Command View XP computer or Command View XP or XP RemoteWeb Console software, see

Corrective actionErrora. Verify that the cable between the local arrayand external array is connected properly.b. If the cable between the local array

Corrective actionErrordeleted, or the externalarray itself was replacedby another device.Corrective action: Theexternal array's port isrecognized

Corrective actionErrorpath, contact yourHP account supportrepresentative.Status: The reply of theexternal array wasCommand abortedABORTEDCOMMAND.An er

Corrective actionErrorCorrective action: Theexternal array's port isrecognized. Check theexternal array's settingand status. If you cannotre

Corrective actionError• The topology settingbetween the externaland target ports doesnot match.• Because security is seton the port, theexternal array

Corrective actionErrorcannot restore the path,contact your HP accountsupport representative.Status: The reply from theexternal array wasUnavailableUna

NOTE:The phrases mapped as an internal LU and mapped as an internal LDEV should be interpreted tomean that the external LU is specifically mapped into

Corrective actionError• The local array port and external array port arenot connected using FC cables.• Port security is improperly set on the externa

Corrective actionErrornormally, the device can be used immediately. If thedevice is blocked as a result of the device statustransition, see the descri

Troubleshooting External Storage XP162

A Notes on connecting external arraysNOTE:If you have an EVA or MSA connected as external storage and you need to perform a firmware upgradeon the EVA

Connecting Thunder 9500V subsystemsSystem parameters for connecting Thunder 9500V subsystemsTable 13 explains whether to specify system parameters whe

Parameter settingParameterPane nameYou can either specify thisparameter or omitspecifying this parameter.ROM MicroprogramVersionYou can either specify

Relation btw. ser. nums. in the Dev. list on LU Op. pane & Thunder 9500Vsubsys. mod.When the external array is a Thunder 9500V subsystem, you can

NOTE:In WWNs, X is an arbitrary number or character. Ports in the same apparatus have identical values.Path status and examples of recovery procedures

Examples of recoveryproceduresPath statusThe volume may have been set asa pair volume for data copy.Response errorCheck if the volume is set as a pair

Connecting TagmaStore AMS and TagmaStore WMSsubsystemsSystem parameters for connecting TagmaStore AMS and TagmaStore WMSsubsystemsTable 17 explains wh

Figure 1 External Storage XP conceptExternal Storage XP user guide for the XP12000, XP10000, SVS200 17

Parameter settingParametersPanenameYou can either specify this parameter or omit specifying thisparameter.WEB TitleSet this parameter to ON.Write and

Relation btw. the WWN of the port on the TagmaStore AMS or TagmaStoreWMS subsys. and contr.When the external array is a TagmaStore AMS or TagmaStore W

Examples of recoveryproceduresPath statusCheck the LU paths' settings. If theLU paths' settings changed, changethe settings back to the ones

Examples of recoveryproceduresPath statusCheck the volume's accessattribute. If the volume is protectedby the access attribute, release theprotec

Examples of recoveryproceduresPath statusCheck the LU paths' settings. If theLU paths' settings changed, changethe settings back to the ones

Examples of recoveryproceduresPath statusCheck the volume's accessattribute. If the volume is protectedby the access attribute, release theprotec

Examples of recoveryproceduresPath statusthe settings back to the ones usedwhen the volume was mapped. Oruse External Storage XP to performthe Delete

Examples of recoveryproceduresPath statusThere is a problem with connectionto the external array. The followingare possible causes:Cannot detect port•

Examples of recoveryproceduresPath statusThe volume may have been set asa pair volume for data copy.Illegal requestCheck if the volume is set as a pai

Connecting HP 200 Storage Virtualization System as externalstorageWhen connecting an HP 200 Storage Virtualization System (SVS200) as the external arr

Overview of connecting external arrays18

Examples of RecoveryProcedurePath Statuscopy program. If the volume is setas a pair volume, the volume mightbe protected because of the pairstatus. If

Examples of RecoveryProcedurePath StatusLUN Manager might have enabledLUN security.Check if the LUN security isenabled or not. If LUN security isenabl

microprogram version 4.000 or later• Array type: EVA4000/6000/8000microprogram version 5.031 or laterTo replace the EVA array's microprogram, che

B Required volume capacity for emulationtypesWhen mapping an external LU as a local array internal LDEV, you must specify the mapped volume'semul

External LU's maximum usable capacityEmulation type695.98 GB3390 mainframe emulation typeAccording to these restrictions, you can determine the e

are the same. For the OPEN-V emulation type, the base data area capacity is not listed because thereis no concept of the base data area capacity.In th

Control informationarea capacityBase data area capacityMinimum data areacapacityEmulation typecylindersblockscylindersblockscylindersblocks5392,22065,

MaximumnumberofLDEVswhenmaximumcapacityofexternalLU ismapped1Maximum capacity ofexternal LU (blocks)Minimum LDEVcapacity (blocks)Base LDEV capacity(bl

Required volume capacity for emulation types188

C Adjusting volume capacity for copy pairsettingWhen creating a Business Copy XP or Flex Copy XP copy pair, the S-VOL's capacity must be thesame

2 Preparing for External Storage XPoperationsThis chapter describes requirements, preparations, and notes for External Storage XP. This chapteralso de

Figure 72 Copying data from external arrays (using external LUs as P-VOLs)Copying data to external arrays (setting external LUs as S-VOLs)For A, B, an

D Configuring MSA1000/1500 as externalarraysNOTE:Externally connected MSAs must not contain Continuous Access XP P-VOLs or S-VOLs.Configuring external

NOTE:References to MSA generally refer to both the MSA1000 and the MSA1500 (both with anActive/Passive controller). Although the standby MSA controlle

Defining MSA array objectsUse the Array Configuration Utility (ACU) to define at least one internal MSA array object (for instance,“A”) when first set

Figure 76 Defining MSA LUs with ACUSelective Storage PresentationYou must institute LUN security on MSAs using the ACU Selective Storage Presentation

IndexAActive/Standby (A/S) controllers, 32ACU (Array Configuration Utility), 192, 193ACU Selective Storage Presentation (SSP), 194Add LU (Auto) operat

Ddeinstalling External Storage XP, 39Delete LU command, 132Device Error message, 161Device list, 70Device tree, 69Disconnect Paths, 131Disconnect Subs

external LUsAdd LU, 93alternate paths, adding to multiple, 113alternate paths, defining, 26, 105alternate paths, deleting to multiple, 115Business Cop

local arrayscapacity, 183configuring, 191connection status, 74defined, 15Fibre Channel connections, 16mapping restrictions, 16port settings, 24, 86pow

RRAID Manager XP, 104, 145Read and Write performance, 45related documentation, 11remote command devicesContinuous Access XP, 149defined, 145mapping, 1

Legal and notice information© Copyright 2007 Hewlett-Packard Development Company, L.P.Confidential computer software. Valid license from HP required f

Storage arrays that can be connected as external arraysTable 2 lists storage arrays that can be connected as external arrays. Notes about the appearan

VVMA information, displaying, 103VMA setting, 89volume capacityadjusting, 189required, 183Volume Detail window, 120Volume Manager, 46Volume Retention

NotesStorage array• In External Storage XP panes, the array appears as “AMS”.• Alternate paths are in Single mode.TagmaStore™ Workgroup ModularStorage

NotesStorage array• In this user guide, the arrays appear as “SANRISE9900V subsystem”.• In External Storage XP panes, the arrays appear as “9970V” and

Contact your HP account support representative for the latest external array and FC switch supportmatrix.External Storage XP requirementsTable 3 Exter

For instructions, see the HP StorageWorks Command View XP user guide for XP Disk Arrays or theHP StorageWorks XP Remote Web Console user guide for XP1

External LU groupsWhen mapping an external LU as an internal LDEV, you must register the external LU in an externalLU group.You can classify external

If you select Enable, the local array signals the host that an I/O operation completed after receivingthe data into the local array's cache memor

balancing across paths). For Multi mode, all set paths are used at the same time. The paths are usedto execute I/Os to the external LU, distributing t

Figure 3 Example of alternate path configuration using two switchesIn Figure 4, two paths are configured between the internal LDEV and external LU. Ho

Figure 5 Alternate path mode is Multi modeNOTE:In Multi mode, active I/O load balancing occurs across external array ports and controllers. TheXP and

ContentsAbout this guide ... 11Supported storage platforms and firmware

Figure 6 Alternate path mode is Single mode• Alternate path mode is Single mode and at least one alternate path is in Standby statusFigure 7 shows an

Figure 7 Alternate path mode is Single mode with alternate paths in Normal and StandbyNOTE:External arrays with Asymmetrical Active/Active (AAA) contr

Figure 8 Alternate path mode is Single mode with alternate paths in Standby onlyNOTE:External arrays with Active/Standby (A/S) controllers, such as th

NOTE:To disconnect an individual LU, use the Disconnect Volume command. To delete a single externalLU's mapping, use the Disconnect Volume comman

Powering local arrays on or offTo power local arrays offCAUTION:When you want to turn off both the local array and the external array, you first need

Powering external arrays on or offTo power external arrays off1. Stop read and write I/Os to the external LU that is mapped as a local array internal

CAUTION:Make sure that the power supply of the local array is completely off and then go on to the next step.5. Turn off the power supply of the exter

CAUTION:You can select the mapped volume's emulation type as required. If you select an emulationtype for an open-system (such as OPEN-V), go to

Figure 9 Writing new data to mapped external LUsUsing existing data in mapped external LUsFigure 10 shows an example of using existing data in a mappe

NOTE:Do not access any external storage volume that is mapped as an External Storage XP volume from a hostconnected directly to the external array. Al

Using external LUs for Business Copy XP operations ... 52Using external LUs for Snapshot

5. Use the Command View XP or XP Remote Web Console Licensing module to remove the FlexCopy XP license key. For instructions, see the HP StorageWorks

• If you map an external LU that is equal to or greater than 695.98 GB with a 3390 mainframeemulation type, you can access data stored in the field up

Figure 13 External LU capacity is smaller than the specified emulation type's basic capacity• IO Suppression mode can only be selected when the v

• If you set a mainframe-system emulation type for the mapped LU, host I/O is always propagatedasynchronously to the external LU regardless of the Cac

• Do not map multiplatform volumes of external arrays as internal LDEVs.• After executing the Check Paths & Restore Vol., Disconnect Subsystem, or

HDD typeApplicationHD-FC S-ATAFCNot RecommendedOKFile operationfrom host(both Read andWrite)OKOKFile operationfrom host(mainly Read)RecommendedOKBacku

When the amount of I/Os from the host to the external LU exceeds the maximum amount of I/Osthe external array can accept, commands from the host to th

HP StorageWorks LUN Configuration and Security Manager XP user guide for theXP12000/XP10000/SVS200.• If you use the CVS function to create LDEVs from

• Volume SecurityYou must set the IO Suppression mode to Disable to use the mapped external LU for Volume Securityoperations.• Volume Retention Manage

Figure 14 Example of Auto LUN XP operations1. Use External Storage XP to map a volume in the external array to an internal LDEV of the localarray.For

Restoring external LUs (Restore) ... 119Displaying configuratio

Using external LUs for Continuous Access XP operationsFigure 15 shows an example of using an external LU for Continuous Access XP operations. Themappe

perform the Write to Control Blocks operation if you mapped a volume for which the data areahas already been zero-formatted on the external array side

2. If you set an open-system emulation type when mapping the volume, the mapped volume's statusautomatically becomes Normal. However, the volume-

2. If you set an open-system emulation type when mapping the volume, the mapped volume's statusautomatically becomes Normal. However, the volume-

For more information, see Mapping external LUs (Add LU).2. The mapped volume's status automatically becomes Normal. However, the volume formattin

3 Managing cache with external storageXP disk arrays and storage virtualization systems use cache to facilitate host and internal I/O. Whencache mode

Determining, setting, or changing the external LU cache modeYou set the cache mode when you define external LUs. HP strongly recommends that you set c

Figure 19 LU Operation pane, Cache Mode settingChanging the cache modeIf you need to change the cache mode for existing external LUs, you must delete

2. To find the LU number and UUID, select an external device group in the Device tree (Figure 20).The LU number appears in the LUN column in the Devic

Figure 21 LU Operation pane, Path Setting optionThe Path Setting pane appears (Figure 22).Figure 22 Path Setting pane4. To find the CVS settings, mapp

Rel. btw. ser. numbs. in Dev. list on the LU Op. pane & T-Stor. AMS & T-Stor. WMS subsys.mods. ...

Figure 23 LDEV Information paneDeleting and remapping the external LUYou must delete and remap each LU that needs the cache setting changed. Using the

Partitioning cache for external storageSeparate cache partitions isolate the applications that are using XP arrays and storage virtualizationsystems f

Determining the number and size of needed partitionsThe minimum cache partition (CLPR) size is 4 GB. Determine the size you need for each CLPR beingus

Figure 24 Partition Definition pane5. Click Apply for the changes to becomes effective.6. Repeat step 3 through step 5 to define any additional CLPRs

Figure 25 Partition Definition pane, Cut optiond. Right-click the CLPR that you want to assign the selected external storage groups to, andthen select

f. Repeat step 7b through step 7e until you have allocated the external storage groups to theappropriate CLPRs according to the plan you created after

Managing cache with external storage66

4 External Storage XP panesExternal Storage XP operations involve the LU Operation and Port Operation panes. In addition tothese two panes, the Flex C

Figure 28 LU Operation pane• Device, WWN, and Port treesDisplays information in the Device, WWN, or Port list depending on the item selected in the tr

• Total number of External LUs: Number of external LUs that are connected.• Found WWNs: WWNs found when you clicked Discovery in the Device tree.• Rem

Figures..External Storage XP concept ... 171..Example of alternate pa

NOTE:Not all types of detected external arrays are supported.• Product name of the connected external arrayDisplays the name of the external array tha

• Vendor: Vendor name.• Ex-Dev. Status: Status of the operation executed to the external array, or status of pathconnection. External array's sta

• LDEV Status: Mapped external LU's status. Possible values: Normal, Unknown, Blockade,Warning, and Format.Table 9 Mapped external LU status valu

• Group: External LU group number and reference number assigned to each LU in the externalLU group. External Storage XP automatically assigns referenc

• External DevicesWhen selected, displays information about the external array connected to the external port inthe WWN list.• Product name of the con

• I/O TOV: Value specified as the timeout for I/O to the external LU.• Qdepth: Number of Read/Write commands that can be issued (queued) to the extern

• Not ready: External array replied NOTREADY.• Illegal request: External array replied ILLEGALREQUEST.• Command aborted: External array replied ABORTE

When selected, displays nothing in the Port list. Subsystem is selected when you initially displaythe Port tree.• ExternalWhen selected, displays info

• Path: Number of set paths.• FLI_TOV: Wait time (in seconds) from the switch to FLOGI when the switch is connected. ExternalStorage XP automatically

• Illegal request: External array replied ILLEGALREQUEST.• Command aborted: External array replied ABORTEDCOMMAND.• Busy: External array is in BUSY st

..Port tree ... 7633..Port list (External

Preset list (LU Operation pane)Displays rows from the Device list that are about to be acted upon. You can apply settings to the localarray after chec

Figure 37 Port Operation pane• Port Operation treeDisplays information about the selected port in the Port list (right pane). You can select Subsystem

Cancels all settings in the Preset list.Port Operation treeDisplays ports in the connected local array. Contents displayed in the Port Operation list

Port Operation listDisplays ports in the local array that External Storage XP can use or set. The port information displayedcorresponds to the item se

Preset list (Port Operation pane)This list displays rows from the Port Operation list that are about to be acted on. Check the contentsof the Preset l

5 Configuring external LUsUse External Storage XP to perform operations to access external LUs, such as setting the port attributeto the external port

4. Perform the Discovery operation.In the Device tree on the LU Operation pane, select an external array, and select Discovery (seeMapping external LU

NOTE:The ports that can be set as external ports are only the ports serving LDEVs, belonging to CU group 0. Ifthe storage is partitioned by using Virt

Mapping external LUs individually (Add LU)This section describes mapping operations starting with the Add LU command. Use the Add LU(Figure 42), Selec

• VMAInformation about the VMA setting of LUN Security XP Extension. If you mapped the external LUand previously set the VMA of LUN Security XP Extens

..Using Continuous Access XP or Continuous Access XP Journal with remote commanddevices ...

CAUTION:To use the mapped external LU for the software products other than Flex Copy XP (such as CacheLUN XP, Auto LUN XP, Continuous Access XP, Conti

Displays the Select Paths pane (Figure 43). Use the Select Paths pane to select paths as candidatesfor primary and alternate paths and select paths th

Displays the SSID window, where you can continue with the next step of the mapping operation.If the SSID setting is not necessary, the Add LU window c

Ports excluded from being candidates for the ports setting the primary and alternate paths appearamong the external array ports that can be set as the

• To map all the external LUs displayed in the CU:LDEV list at one time:Click Linear, and select an internal LDEV on the LDEV map. The same number of

Figure 45 Add LU pane (mapping with the Linear button released6. If you do not want to automatically set primary and alternate paths, but want to spec

Figure 46 SSID window• If the SSID setting is not necessary, the Add LU window closes, and the LU Operation paneappears. Settings appear in blue itali

15. Click OK. The mapping set in the Add LU window is applied to the local array, and the specifiedcontents appear in the Device list.If errors occur

Figure 48 Auto Map Setting window• ExG (1-16384)Group number containing the specified external LU. Specify any decimal value from 1 to 16384.The E dis

CAUTION:To use the mapped external LU for products other than Flex Copy XP (such as Cache LUN XP,Auto LUN XP, Continuous Access XP, Continuous Access