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Copyright © 1999, Compaq Computer Corporation

AA–RHH6B–TE

Printed in U.S.A.

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Storage Area Network
Configurations for

RA8000/ESA12000 on
Windows NT – Intel

  

Application Note

    AA-RHH6B-TE

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Introduction

This application note describes fibre channel switch based Storage Area Network (SAN)
configurations for RA8000/ESA12000 storage systems on Windows NT Intel platforms. For mixed
platform heterogeneous SAN configurations refer to the "Heterogeneous Storage Area Networks"
application note, and the applicable platform specific application notes listed in Table 3.

Enterprise Network Storage Architecture (ENSA)

The Compaq Enterprise Network Storage Architecture is key to supporting Compaq’s NonStop
eBusiness strategy; through ENSA, Compaq leverages industry standards to allow deployment of
storage where applications need it. ENSA uses the Compaq StorageWorks product family to deliver
the storage solutions that address non-stop computing requirements like availability, reliability,
performance, scalability, manageability, and data backup/restore capabilities. ENSA addresses the
storage issues that our customers expect to face now and in the future. Compaq SANs address today’s
issues including:

 

Data protection

 

High availability

 

Increased distance

 

High connectivity

 

High bandwidth

 

Multi-vendor platform support

 

Enterprise backup support

 

Economical capacity growth

 

Scalability

 

Investment protection

With the addition of multi-switch fibre channel Fabric support in the RA8000/ESA12000 FC storage
products and the integration of Enterprise Backup Solutions into the SAN, Compaq has taken the next
evolutionary step in delivery of the ENSA vision. Our customers can now realize the full benefits of a
scalable Storage Area Network providing the robust backbone needed to address dispersed server
operation with shared storage access and backup across the enterprise.

Summary of Contents for 295242-B21 - RAID Controller - UW SCSI 40 MBps

Page 1: ...Compaq Enterprise Network Storage Architecture is key to supporting Compaq s NonStop eBusiness strategy through ENSA Compaq leverages industry standards to allow deployment of storage where applications need it ENSA uses the Compaq StorageWorks product family to deliver the storage solutions that address non stop computing requirements like availability reliability performance scalability manageab...

Page 2: ...ables two servers to share an RA8000 or ESA12000 FC storage system through a Fibre Channel bus If a server failure should occur the storage I O is re routed through to the functioning server This process called cluster failover requires no resource downtime ensuring the high availability of data The RA8000 and ESA12000 FC storage systems are supported in Windows NT MSCS cluster configurations All ...

Page 3: ...from a single location or from multiple locations All of the storage becomes available to any server regardless of physical location SAN Management SAN management tools and product features provided with the RA8000 ESA12000 storage systems include the following SAN Storage and Switch Management SWCC Utilized to manage and monitor storage systems storagesets and SAN fibre channel switches including...

Page 4: ... the upper limit performance specifications for the components of the RA8000 and ESA12000 FC storage systems based on testing using standard storage performance tests and methodologies These numbers should be used to compare component level performance as a means to determine the best configuration from a performance perspective User application tests may not necessarily reach these levels of perf...

Page 5: ...rogeneous SAN it is necessary to adhere to the platform specific rules and maximums for each given platform within the SAN SAN Design Selection Process It is suggested that the following general steps be followed when initially designing a SAN 1 Considering capacity connectivity availability distance performance and backup requirements select the SAN Fabric configuration that best fits your needs ...

Page 6: ...Fabrics is based on the specific server model capabilities and the maximum number of FC HBAs supported Within a single Fabric maximum of 1 switch hop between servers and storage maximum of 2 switch hops worst case with a single fault a Fabric can re route to a 2 hop path on a single link failure A hop is defined as 1 or more connections between two FC switches for example 2 switches cascaded 1 hop...

Page 7: ...mber of FC HBAs per server is 4 or total allowed in the server if less than 4 Use Selective Storage Presentation see below to assign specific LUNs exclusively to each HBA The maximum number of active controller ports per FC HBA is 4 Any combination of Windows NT Servers standalone or clustered and RA8000 ESA12000 storage systems is allowed per SAN configuration provided these rules are followed 1 ...

Page 8: ...in Transparent Failover and up to 16 Servers when in Multiple bus Failover Rename connection names By default new connection names are automatically added to the controller connection name table by the controllers when they detect a path to an adapter from each active controller host port The default connection name assigned by the controllers will be NEWCONnn where nn is a number from 1 to 64 Aft...

Page 9: ...network access is available between the Client and all HA servers For servers accessing controller host port 1 use LUN number and offset values in the range of 0 99 for controller host port 2 use number and offset values in the range 100 199 Use the Unit Preferred Path parameter to assign units to a specific controller Distribute units equally across both controllers for proper load balancing SSP ...

Page 10: ...vity or storage capacity needs you may choose to implement your SAN maximized for one or the other or a lesser number of either All configurations allow the flexibility to trade off server and storage system count based on total FC switch port availability however you cannot exceed the upper bound limits listed or the platform limits in Table 2 for each configuration All configurations support a m...

Page 11: ...ation Example SAN Configuration 1 Server Storage Connectivity Rules Any mix of Windows NT Intel Servers standalone or clustered and storage systems using these maximums Assumes 1 FC HBA per server an even storage port count and no EBS ports 16 port FC Switch total number of switch ports available for Servers and Storage is 16 Maximum Server Connectivity Up to 12 Servers and 1 Storage System 4 stor...

Page 12: ...otes When configured with greater than 4 Windows NT Servers per active controller host port classified as an NT Extended Configuration refer to the StorageWorks Windows NT Platform Kit FC Software Setup Utility For servers accessing controller host port 1 use LUN number and offset values in the range of 0 99 for controller host port 2 use number and offset values in the range 100 199 Performance c...

Page 13: ...d separate path to the storage is provided to each server The 2 switches form isolated Fabrics providing the highest level of storage path fault tolerance should a failure occur with any path component FC HBA FC Switch Fabric path interconnect or storage controller Non HA configured servers and storage configured in Transparent Failover Mode are supported in this configuration however access may b...

Page 14: ...500 meters per FC cable segment 1 km total server to storage using 50 micron multi mode fibre optic cable Refer to general Fabric rules for other cable types SAN Configuration 2 Notes Uses Compaq Secure Path for Windows NT minimum version 2 2 When configured with greater than 4 FC HBA s per active controller host port classified as an NT Extended Configuration refer to the StorageWorks Windows NT ...

Page 15: ...nnectivity between two remote sites The HSG80 array controllers within the RA8000 or ESA12000 storage enclosure are configured in Transparent failover mode providing full controller redundancy in the unlikely event of either controller failing Figure 4 Two Switches Cascaded Fabric Configuration Example SAN Configuration 3 Server Storage Connectivity Rules Any mix of Windows NT Intel Servers standa...

Page 16: ...to storage when using 9 micron single mode fibre optic cable and long wave GBICs SAN Configuration 3 Notes Each FC Switch must have a unique domain number Domain_ID When configured with greater than 4 Windows NT Servers per active controller host port classified as an NT Extended Configuration refer to the StorageWorks Windows NT Platform Kit FC Software Setup Utility For servers accessing control...

Page 17: ...ath for Windows NT software With 2 FC HBA s in each server and 4 FC switches in 2 separate isolated Fabrics a second separate path to the storage is provided to each server The 2 switch pairs form isolated Fabrics providing the highest level of storage path fault tolerance should a failure occur with any path component FC HBA FC Switch Fabric path interconnect or storage controller Non HA configur...

Page 18: ...80 controller pairs are configured in Multiple Bus Failover Mode for single path servers non HA controllers are configured in Transparent Failover Mode EBS Integration Supported SAN Configuration 4 Fabric Rules Total Switches 4 16 port or 8 port Maximum Switch Hops nominal 1 in each path Maximum Switch Hops worst case 1 in each path Maximum number of ISLs between the two switch in each path 15 Max...

Page 19: ...er host ports configured per FC HBA is 2 for high bandwidth applications and 4 for high throughput applications Use these general performance rules to determine the optimum number of ISLs required between both switches For balanced SAN performance configure 1 storage system on each FC switch For the highest available performance whenever possible devices that exchange the highest amount of data sh...

Page 20: ... the specific server and storage configuration and count and the applications utilized The ISL s can be up to 10 km allowing connectivity between three remote sites The HSG80 array controllers within the RA8000 or ESA12000 storage enclosure are configured in Transparent failover mode providing full controller redundancy in the unlikely event of either controller failing Figure 6 Three Switches Cas...

Page 21: ... segment 1 5 km total server to storage 2 0 km worst case when using 50 micron multi mode fibre optic cable Refer to general Fabric rules for other cable types Up to 10 km per inter switch link 11 km total server to storage 21 km worst case when using 9 micron single mode fibre optic cable and long wave GBICs SAN Configuration 5 Notes Each FC Switch must have a unique domain number Domain_ID When ...

Page 22: ...dth applications One ISL between switches for every 2 storage controller ports on one switch being accessed by a server on the other switch For high throughput applications One ISL between switches for every 6 storage controller ports on one switch being accessed by a server on the other switch ...

Page 23: ...he 4 switches as shown Additional ISLs may be required based on the specific server and storage configuration and count and the applications utilized The cross coupled ISLs ensure that the hop count within the Fabric does not exceed 2 for a single path failure The ISL s can be up to 10 km allowing connectivity between four remote sites The HSG80 array controllers within the RA8000 or ESA12000 stor...

Page 24: ...dby and 4 Servers 32 12 ISL ports 4 server ports 16 storage ports Maximum of 4 active controller host ports per FC HBA All HSG80 array controllers configured in Transparent Failover Mode NOTE High availability storage using Secure Path for Windows NT and Controller Multiple bus Failover Mode is currently not supported in this configuration SAN Configuration 6 Fabric Rules Total Switches 4 16 port ...

Page 25: ...width applications and 4 for high throughput applications Use these general performance rules to determine the optimum number of ISLs required between both switches For balanced SAN performance configure 1 storage system on each FC switch For the highest available performance whenever possible devices that exchange the highest amount of data should be connected to the same FC switch for example se...

Page 26: ... 60HZ ESA12000 w dual HSG80 48 Slot 50HZ ESA12000 w dual HSG80 48 Slot 50HZ ESA12000 w 2 pairs dual HSG80 48 Slot 60HZ ESA12000 w 2 pairs dual HSG80 48 Slot 60HZ ESA12000 w 2 pairs dual HSG80 48 Slot 50HZ ESA12000 w 2 pairs dual HSG80 48 Slot 50HZ 380570 B21 Blue 380570 B22 Opal 380568 B21 380640 001 Blue 380640 002 Opal 380650 B21 Blue 380650 B22 Opal Pedestal Expansion 24 slots Pedestal Expansio...

Page 27: ...ility system configurations In the rare event that a storage controller fails the mirrored data is immediately available to the remaining controller for continuing operation The RA8000 FC pedestals and rackables come in both single controller and in dual controller models to allow the customer to select the level of high availability required for their application A single controller model can be ...

Page 28: ...dows NT Server Intel AA RH0QB TE or 387393 002 Windows NT Intel RA8000 ESA12000 Installation RA8000 ESA12000 Fibre Channel Solution Software for Windows NT Intel Installation Reference Guide AA RFA9C TE Windows NT Clusters RAID Array 8000 ESA12000 Fibre Channel Cluster Solutions for Windows NT EK NTC8K IG Secure Path Installation StorageWorks Secure Path for Windows NT Installation Guide EK WNTMP ...

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