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iSCSI in a Heterogeneous SAN

8

iSCSI SR2122 Storage Router: Getting Started Guide

Fibre Channel SAN

A Storage Area Network is a dedicated, centrally managed, secure information infrastructure,
which enables any-to-any interconnection of servers and storage. SANs are built to incorporate
the best of both storage and networking interfaces: fast and efficient communications
optimized for movement of large amounts of data, but with access to a wide range of other
servers and storage devices on the network.

The SR2122 iSCSI Router is supported on any currently supported HP B-Series, C-Series, or
M-Series switch fabric. For the latest HP switch topoligies and fabric rules, please read the
“HP StorageWorks SAN Design Reference Guide” avalable at:

http://h18000.www1.hp.com/products/storageworks/san/documentation.html

SAN Storage

The SR2122 supports the RA/MA8000, ESA/EMA12000, MSA1000, EVA, VA and XP
storage arrays.

Please read “

HP StorageWorks SAN Design Reference Guide

” (link above) for the latest HP

storage configurations and rules.

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Summary of Contents for ISCSI SR2122

Page 1: ... the integration of IP based Storage Networks using the iSCSI protocol to HP StorageWorks Fibre Channel SANs and HP Storage arrays The HP SR2122 iSCSI Router is used to bridge from TCP IP hosts to Fibre Channel storage For the latest version of this document access the HP storage website at http www hp com country us eng prodserv storage html ...

Page 2: ...f Hewlett Packard The information contained in this document is subject to change without notice Compaq Computer Corporation is a wholly owned subsidiary of Hewlett Packard Company Microsoft MS DOS MS Windows Windows and Windows NT are U S registered trademarks of Microsoft Corporation UNIX is a registered trademark of The Open Group Hewlett Packard Company shall not be liable for technical or edi...

Page 3: ...ng Storage to the iSCSI Initiators from the SR2122 over IP page 23 Configuring hp StorageWorks Secure Path for Windows with the SR2122 Storage Router page 45 Windows MSCS Cluster Support page 52 SR2122 Insight Manager 7 Service Pack 2 Integration page 56 Sample Configurations page 64 Intended Audience This document is intended for customers who purchased the iSCSI SR2122 Storage Router Other iSCSI...

Page 4: ...SCSI Configuration Application 36 Figure 24 iSCSI Configuration Screen 36 Figure 25 iSCSI Connection Status 37 Figure 26 iSCSI Initiator Properties 39 Figure 27 Add Target Portal 40 Figure 28 Log On to an Available Target 40 Figure 29 Verify Connection 41 Figure 30 Session Details 42 Figure 31 Secure Path configuration example 47 Figure 32 Iscsi03 HP Config Screen Example 52 Figure 33 Checking tha...

Page 5: ...l Ethernet applications IP LAN WAN routers and switches can be used to extend the IP storage network to the wide area of applications such as synchronous and asynchronous remote disk copy or tape backup and restore Note Although the iSCSI protocol is written as a complete data transport from host to storage this chapter will only discuss the current HP supported topology of iSCSI hosts to Fibre Ch...

Page 6: ...h SR2122 The SR2122 accesses FC storage devices connected to the Fibre Channel interfaces of each SR2122 A typical IP FC network example Figure 1 IP FC Network Example Client Host or iSCSI Initiator HP SR2122 Storage Router HP StorageWorks MSA 1000 Storage Server or Workstation running W2K or Linux IP Ethernet Protocol FC Protocol SAN Storage Has the iSCSI Driver loaded on it to enable Target reso...

Page 7: ... presents the iSCSI targets to IP hosts iSCSI initiators as if the physical storage devices were directly attached to the hosts With SCSI routing storage devices are not aware of each IP host the storage devices are aware of the Storage Router and respond to it as if it were one FC host You can configure storage routers in a cluster to allow the storage routers to back each other up in case of fai...

Page 8: ... of data but with access to a wide range of other servers and storage devices on the network The SR2122 iSCSI Router is supported on any currently supported HP B Series C Series or M Series switch fabric For the latest HP switch topoligies and fabric rules please read the HP StorageWorks SAN Design Reference Guide avalable at http h18000 www1 hp com products storageworks san documentation html SAN...

Page 9: ...able 10 or with the HP M Series Product Line switches listed in Table 12 of the SAN Design Guide View the SAN Design Guide at http h18000 www1 hp com products storageworks san documentation html Network Interface Controller NIC Hardware Support The following Proliant Server Network Interface Controllers are supported NC6136 Gigabit Server Adapter NC7131 Gigabit Server Adapter NC7770 PCI X Gigabit ...

Page 10: ...ft Windows 2003 MSCS not supported Secure Path Auto Path not supported IA64 not supported iSNS server not supported Compaq Network Teaming Software Support Compaq Network Teaming Windows 2000 and Windows 2003 only SR2122 Management Software Support The following HP management software is supported Compaq Insight Manager 7 HP OpenView Storage Area Manager SAM ...

Page 11: ...0 RA MA8000 EMA ESA12000 and Enterprise Virtual Array for Linux are not supported HP Auto Path for VA XP for Windows 2000 and Linux are not supported HP Secure Manager on XP and VA is not supported Microsoft Initiator Rules Supported on Windows 2000 and Windows 2003 only MSCS Clusters not supported Table 1 SR2122 Router Rules Maximum scsirouter instances per SR2122 Router and per SR2122 Router Clu...

Page 12: ...s Fibre Channel Switch Fabric Rules The SR2122 is supported on the B Series SAN switches M Series SAN switches and C Series SAN switches Read HP StorageWorks SAN Design Reference Guide for the latest switch topologies and fabric rules The SR2122 should only be zoned with the storage devices that it will access Zoning the SR2122 with other servers is not supported Management Software Rules HP OpenV...

Page 13: ...122s In Clustered Mode up to four SR2122s can be used as failover when presenting storage to iSCSI Initiators Note A Standalone SR2122 can be added to a SR2122 Cluster without re initializing the standalone router to preserve its configuration For further SR2122 configuration details please read HP StorageWorks iSCSI storage router 2122 User Guide PN 304835 002 Chapter 5 Configuring the Storage Ro...

Page 14: ...s are recognized as F Ports by the FC switch and as FC HBAs by the Storage Arrays Ports FC1 and FC2 may be used but they cannot be served the same LUN from the same storage array as multi pathing is currently not supported After physically connecting the FC port s and if zoning is enabled it is recommended to create a new zone that includes the FC Port WWPNs and the WWPNs of the storage arrays tha...

Page 15: ...the storage arrays that will be serving storage to the SR2122 Note Important Although Multi Auto Pathing is not supported in a SR2122 clustered environment a certain level of failover is available at the SR2122 when configured in a cluster Normally only one SR2122 within the cluster is responsible for the active I O path between the iSCSI Initiator and the Storage Array as an iSCSI Initiator s I O...

Page 16: ...e storage array in question Please read HP StorageWorks SAN Design Reference Guide September 2003 Part Number AA RMPNJ TE for the latest HP storage configurations and rules Presenting MSA1000 LUNs to the SR2122 MSA1000 storage volumes must be pre configured before the LUN s can be detected and recognized by the SR2122 The MSA1000 can be configured either through its serial port or through the Arra...

Page 17: ...esenting RA MA8000 ESA EMA12000 and EMA16000 LUNs to the SR2122 RA MA8000 ESA EMA12000 and EMA16000 HSG80 storage volumes must be pre configured before the LUN s can be detected and recognized by the SR2122 The HSG80 controllers can be configured either through its serial port or through the HSG Element Manager application found on the SAN Management appliance Whatever method is chosen we must now...

Page 18: ...mple a Show Unit command may display HSG80 Show Units LUN Uses Used by D1 DISK10000 D2 DISK10100 D3 DISK30000 D4 DISK30100 D81 DISK40300 D107 DISK20000 D108 DISK20100 D181 DISK40400 To present Unit 81 to the SR2122 the command would be HSG80 set D81 enable isrfc1 p1 To verify D81 is enabled only for the SR2122 type the command HSG80 Show D81 LUN Uses Used by D81 DISK40300 LUN ID 6000 1FE1 0007 BB4...

Page 19: ...t to the SR2122 Make sure only one of the four ports is included in the same SAN zone as the SR2122 FC port Caution This will prohibit controller failover The user must now use the HSV110 s selective storage presentation SSP commands to restrict access to volumes that are to be served to the SR2122 First a host entry for the SR2122 must be added to the EVA and assign its WWPN to it using the HSV E...

Page 20: ...s Figure 6 Host Properties After the Host entry is created it must be assigned to a LUN To assign the Host entry to a LUN click on the Active icon under the LUN name in the Virtual Disk folder In the Content frame click on the button Step 1 Use the pull down menu and find the newly created host entry and select it Click to save the entry The virtual disk entry will appear as ...

Page 21: ...nager SDM Note Although XP s HP Storage Works Secure Manager VA can configure VA LUNs to be selectively presented for SR2122 s FC port it is not supported at this time Currently the entire set of LUNs configured on the VA s Fibre channel port is presented to the SR2122 It is required to have this port dedicated to the SR2122 fabric zone Additional required configurations are 1 Set the Fibre Channe...

Page 22: ...nfigured on the XP s Fibre channel port is presented to the SR2122 It is required to have this port dedicated to the SR2122 fabric zone 1 Set the Fibre Channel HOST MODE 00 to reflect Linux or Windows OS 2 Select the FIBRE TOPOLOGY depends on the configuration 3 Updated SAN support is available via HP s internal web at http turbo rose hp com spock select XP SAN Support Connectivity Streams on the ...

Page 23: ...CL ZG95004652 In this example the SR2122 is presented storage from one HSG80 and one HSV110 The line items are described as 1 This is the CCL from the HSV110 served from storage port 50001fe150002f78 2 This is iSCSI_DISK03 from an HSV110 served from storage port 50001fe150002f78 3 This is iSCSI_DISK04 from an HSV110 served from storage port 50001fe150002f78 4 This is unit D81 from an HSG80 served ...

Page 24: ... the mask 24 was used it would mean to allow any iSCSI Initiators with an IP address that begins with 16 117 74 0 The mask 16 would mean any iSCSI Initiators that begin 16 117 0 0 If the mask 24 was used it would allow any iSCSI Initiators with an IP address that begins with 16 117 74 0 The mask 16 would mean any iSCSI Initiators that begins 16 117 0 0 To display all entries in the Access List use...

Page 25: ...from the SR2122 over IP 25 iSCSI SR2122 Storage Router Getting Started Guide Figure 8 Access List Entry Enter the iSCSI Initiator name and click ADD Figure 9 iSCSI Initiator Name Enter the iSCSI Initiator IP address and IP mask and click ADD ...

Page 26: ...storage over IP to the iSCSI Initiators from the SR2122 is done by creating a SCSI Router Instance within the SR2122 The SCSI Router Instance could be thought as a process or daemon running on the Router that includes among other things an IP address SCSI targets Storage devices and an Access List entry It is the SCSI Router Instance that the iSCSI Initiator communicates with to access it s storag...

Page 27: ...ating a SCSI Router Instance The SCSI Router Instance may be created using the SR2122 Management GUI or by CLI commands In this example we will serve two LUNs from EVA storage to node iSCSI03 using the following information Note A SCSI Router Instance is only active on one SR21212 regardless if the SR2122 is setup in Standalone or Cluster Mode Using the SR2122 CLI the commands would be SR2122 scsi...

Page 28: ...nce of all storage for iSCSI03 SCSI Router Authentication Information Router Authentication Username Password iSCSI03_Disks none none none Router ServerIf Vlan Vid IP Netmask Secondary TCP Port iSCSI03_Disks ge1 33 33 33 101 24 ge2 3260 Router Target Status Accesslist Targetid Description Profile iSCSI03_Disks HSV23_T1 enabled iSCSI03 none not set High Router Target WWPN Primary I F WWPN Secondary...

Page 29: ...SR2122 Storage Router Getting Started Guide Figure 13 SCSI Router Instance Name and Description Enter the Target name Access List entry click the LUN Mapping radio button and click Add Figure 14 Add Target Name and Access List Entry At the Configure LUNs screen click Add LUN ...

Page 30: ... LUN screen enter the SCSI LUN number that will be presented to the iSCSI Initiator click the WWPN radio button and select the appropriate storage controller WWPN with the LUN number from the primary pull down menu and click Add Figure 16 Add New Lun The browser will return to the Configure LUNs screen Click the Add button and add the 2nd LUN for this Target ...

Page 31: ... iSCSI SR2122 Storage Router Getting Started Guide Figure 17 Add Second LUN After Clicking Add the browser will return you to the Configure LUNs screen displaying the two newly created LUNs Figure 18 New LUNs Click on SCSI Routers to display all SCSI Router Instances ...

Page 32: ...SR2122 Storage Router Getting Started Guide Figure 19 All SCSI Router Instances Click on the newly created Instance iSCSI03 Figure 20 Instance iSCSI03 Add ge2 from the Secondary Interface pull down menu add the SCSI Router Instance IP address and its Netmask then click Apply ...

Page 33: ...tance LUNs for other devices have no such restriction iSCSI Initiator Setup The IP host or iSCSI Initiator uses the iSCSI Driver to enable target resource recognition attachment to the SR2122 over IP The iSCSI driver is configured with the Gigabit Ethernet IP address of each SCSI routing instance running on the SR2122 with which the host is to transport SCSI requests and responses The iSCSI initia...

Page 34: ...tion CD and choose Install iSCSI Driver from the install menu or by running Setup exe from the SR2122 Solution CD directory iscsi_initiator HP Win2K Follow the prompts on the screen and accept the license agreement and at the iSCSI Configuration screen you may enter the SCSI Router Instance IP address that the iSCSI Initiator is to use for storage An iSCSI Initiator may communicate with up to eigh...

Page 35: ...tion can be found in the Control Panel Figure 23 iSCSI Configuration Application Click on the hp iSCSI Config icon to return to the iSCSI Config screen Figure 24 iSCSI Configuration Screen The Status button is used to display iSCSI connection status to the SCSI Router Instance IP address and it s associated Targets Note This screen will not display the LUNs attached to the targets ...

Page 36: ...dows 2000 Disk Management s Rescan Disks command Target Settings HP 3 1 3 Driver Only Used to control the usage of iSCSI cyclical redundancy check CRC on the specified target as well as setting the access authentication username and password Global Settings HP 3 1 3 Driver Only Used to control the usage of iSCSI cyclical redundancy check CRC on all targets Settings HP 3 1 3 Driver Only If authenti...

Page 37: ...utton of the iSCSI Configuration Control applet can retrieve status of the iSCSI connections to the remote target nodes and targets Each responding remote target will show up with its IP address connect state and target name or alias The possible connect states are Enter Window s Disk Management application and it should now report new disks and ask to write a signature At this point you would tre...

Page 38: ...d with the Restore Connection button enabled the iSCSI driver will automatically login whenever the server powers up or reboots During setup the install procedure will place a Microsoft iSCSI Intiator icon out on the server desktop as well as in the Control Pamel By clicking on the icon the Microsoft iSCSI driver GUI the Microsoft iSCSI initiator properties will be displayed Figure 26 iSCSI Initia...

Page 39: ... through the Available Portals The Status should be Inactive Next log into the target to discover the SR2122 LUNs by selecting a Target and clicking on Log On Figure 28 Log On to an Available Target Note It is important to enable Automatic Restore if the server is to automatically login to the SR2122 target when the server is powered up or rebooted If not then the Available Targets must be logged ...

Page 40: ...SR2122 Storage Router Getting Started Guide The Target Staus should change to connected To verify that the server is now connected to the SR2122 LUNs click on the Active Sesisons tab highlight the connected Session and click on the Details button Figure 29 Verify Connection ...

Page 41: ...re installing the new driver Please refer to the following web site for the latest sources for the linux driver for the HP SR2122 iSCSI router http sourceforge net projects linux iscsi Loading the iSCSI Driver In a newly installed Red Hat Linux kernel sometimes an iSCSI instance may be running Before installing the iSCSI driver the running instance needs to be stopped To stop the instance run setu...

Page 42: ...about the iSCSI devices To manually stop the iSCSI driver enter etc rc d init d iscsi stop 6 Modify your init scripts to manage iSCSI You may also need to change the order of the boot script to ensure that iSCSI services are started after the network has been initialized 7 List your iSCSI partitions in etc fstab iscsi It has the same format as etc fstab The init scripts will mount and unmount thes...

Page 43: ... for this LUN e g dev scd0 if any The symbolic link generic will map to the SCSI generic device node for this LUN e g dev sg0 if any Because the symlink creation process must open all of the SCSI device nodes in dev in order to determine which nodes map to iSCSI devices you may see many modprobe messages logged to syslog indicating that modprobe could not find a driver for a particular combination...

Page 44: ...shiest corruption may occur Since Linux will not unmount file systems that are being used by a running process before iSCSI devices can be unmounted any processes using those devices must be stopped see fuser 1 To avoid fleshiest corruption the iSCSI shutdown script will automatically kill all processes using devices in etc fstab iscsi first by sending them SIGTERM and then by sending any remainin...

Page 45: ...or Windows with the SR2122 Storage Router Note HP Storageworks for Windows is supported with SR2122s in Standalone Mode only SR2122 HA environments are not supported Note Note Only the HSG80 and HSV110 controllers are supported with Secure Path With Secure Path configured on a server directly connected to a fibre channel SAN a LUN is presented to the server s multiple fibre channel host bus adapte...

Page 46: ...following steps are necessary SAN Storage Setup SR2122 Setup Secure Path Setup iSCSI Initiator Setup Note For setup examples the SR2122 members are Node A and Node B The two SAN fabrics will be called the Ring and the Tree SAN Storage Setup In a High Availability SAN only Fibre Channel port FC1 from each SR2122 is connected to a different fabric SR2122 Name FC1 FC2 Node A Ring Not Used Node B Tree...

Page 47: ...r using the HSG Element Manager GUI or through the HSG s CLI commands present them to both the Node A and Node B connections A rescan either through the SR2122 management GUI within the Monitor Window or through the CLI command Show Devices Rediscover will now show the newly presented HSG80 LUNs Setup for EVA If the EVA ports HSV110 HSV100 controllers are zoned with both Node A and Node B SR2122 r...

Page 48: ...gh the SR2122 s CLI Creating the SCSI Router Instance The SCSI Router Instance may be created using the SR2122 Management GUI or by CLI commands In this example we will serve LUN 2 from the EVA storage presented to SR2122 Node A and Node B to iSCSI client iSCSI03 Note These commands assume the Access List Entry of iSCSI03 has been created The following SR2122 CLI commands will create a SCSI Router...

Page 49: ...one NodeB scsirouter iSCSI03_Disks password none NodeB scsirouter iSCSI03_Disks primary none NodeB scsirouter iSCSI03_Disks reserveproxy disable NodeB scsirouter iSCSI03_Disks failover secondary none NodeB scsirouter iSCSI03_Disks lun reset no NodeB scsirouter iSCSI03_Disks serverIf ge1 33 33 33 104 255 255 255 0 secondary ge2 NodeB scsirouter iSCSI03_Disks target HSV23_T2 lun 1 wwpn 50001fe150002...

Page 50: ... has its iSCSI driver loaded and configured Hp Storageworks Secure Path for Windows Setup Prior to installing the iSCSI driver it is recommended to install Secure Path Although there is no harm if the iSCSI driver is loaded before installing Secure Path loading Secure Path first will alleviate the operating system from reporting multiple disk occurrences in Disk Management as well as multiple Writ...

Page 51: ...t is necessary after the driver installation When HP s Windows iSCSI driver is loaded on the iSCSI initiator it also creates a hp iSCSI Config icon that is accessed through the Control Panel Open the hp iSCSI Config configuration screen and add the IP addresses of the newly created SCSI Router Instances from each SR2122 Node A and Node B 33 33 33 103 and 33 33 33 104 respectively Figure 32 Iscsi03...

Page 52: ...ou would any locally attached disk create partition format etc Verify the correct numbers of paths to this disk with Secure Path Manager Figure 34 Secure Path Manager Example Windows MSCS Cluster Support Microsoft Clustering is supported with the SR2122 and can be easily configured with a few additional settings Because the server s cluster s point of view is that the iSCSI drive s are local a cha...

Page 53: ... multiple network adapters working together as a single network adapter Also the IP addresses entered into the Access List should only be those that will be used by the iSCSI driver to connect to the SR2122 For example a two node MSCS cluster contains members ARTICX0015 and ARTICX0031 each with two NIC cards teamed together connecting to SR2122 Node A and Node B as described in the previous sectio...

Page 54: ...een and add the IP addresses of the SCSI Router Instances from each SR2122 Node A and Node B 33 33 33 103 and 33 33 33 104 respectively A reboot of both MSCS Cluster members is necessary in order for these changes to take effect SR2122 Name Access List Entry name Access List Entries Node A ArticX Cluster 33 33 33 01 33 33 33 02 Node B ArticX Cluster 33 33 33 01 33 33 33 02 SR2122 Name Router Insta...

Page 55: ...ing Started Guide After the MSCS cluster reboots enter hp iSCSI Config again on each cluster member and check the Status of the driver to verify both the SR2122 targets are active Verify the correct numbers of paths with Secure Path Manager to each cluster member Figure 36 Secure Path Manager Example ...

Page 56: ... using an ICMP Ping Spray SNMP Get Requests and HTTP requests Sets up an application launch to the management application of the HP SR2122 Uses SNMP MIB II for data collection of network statistics Periodically status polls and displays status changes within the IM 7 device status page Receives SNMP Traps from the HP SR2122 IM 7 Service Pack 2 requires the following hardware and software for the s...

Page 57: ...h latest Microsoft Service Pack applied Windows NET Server 2003 Standard Edition Windows NET Server 2003 Enterprise Edition To be sure you have the correct version of Microsoft Internet Explorer open the browser and click Help from the menu bar Select About Internet Explorer and an information box is displayed This box lists the version you are currently running You must have V5 50 4522 1800 or la...

Page 58: ...orrectly for the level of SNMP and management support SR2122 SNMP V1 MIBs which effect IM 7 are MIB II RFC 1213 and RFC 1215 Fibre Alliance MIB V2 2 http www fibrealliance org fb mib mib2_2 htm Configuring the SR2122 to integrate with IM 7 SP2 First the SR2122 10 100 Management Port must be enabled The Management port provides TCP IP ICMP SNMP network connectivity to the Management Server running ...

Page 59: ...nity This allows for the IM 7 data collection to bring back the MIB II information It also makes autodiscovery possible by supplying the SNMP MIB II SysOID of the device for identification by IM 7 In order for SNMP traps to be directed to the IM 7 server a user will have to fill in the First IP Address and Second IP Address of the SNMP Trap Host sections These are the SNMP Trap Destinations It sho...

Page 60: ...ust enable Link up Down for whichever Link you wish to monitor state changes with Configuring IM 7 SP2 to integrate with the SR2122 Discovering the HP SR2122 There are a number of ways that IM 7 can discover the SR2122 Automatic Discovery Using the Automatic Discovery page add the SR2122 Management port TCP IP address to the IP Address Range Figure 39 Automatic Discovery Note The Discovery filters...

Page 61: ...R2122 Storage Router Getting Started Guide Figure 40 Discovery Filters Manual Discovery You can also just add the device one at a time But be aware that Device filters should be set properly to allow for network devices to be discovered Figure 41 Manual Discovery ...

Page 62: ... correspond to the HP SR2122 s Read and Write Community settings SNMP Authentication Trap Enabling By default this trap is disabled in IM 7 meaning it is ignored and discarded To enable it you have to edit the settings of RFC 1215 mib as seen below Figure 42 SNMP Authentication Trap Enabling Click on MB Registration then highlight rfc1215 mib in the Registered MIBS scroll menu the click on Edit Re...

Page 63: ...63 iSCSI SR2122 Storage Router Getting Started Guide Figure 43 SNMP Trap Edit Click on Enable Trap Handling then click Apply Figure 44 SNMP Network Query You will find that the HP SR2122 is a network device and will be found via the network device query ...

Page 64: ...or maximum supported SAN and Storage configurations please refer to Chapters 3 and 4 of the HP StorageWorks SAN Design Reference Guide For maximum supported IP configurations please consult with your network administrator Figure 45 Example of Multiple OS Systems in a Non Redundant Path Configuration ...

Page 65: ...Sample Configurations 65 iSCSI SR2122 Storage Router Getting Started Guide Figure 46 Windows 2000 Servers with NIC Teaming 2 Node SR2122 Cluster ...

Page 66: ...Sample Configurations 66 iSCSI SR2122 Storage Router Getting Started Guide Figure 47 Maximum SR2122 Cluster Configuration Using HA Ports ...

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