Bull Cedoc DPS7000/XTA NOVASCALE 7000 CDA 7 5630 Handbuch

CDA 7 5630Product Manual DPS7000/XTANOVASCALE 7000Hardware: CDAREFERENCE77 A1 69UP 00

CDA 7 5630 Product Manualviii 77 A1 69UP Rev002.4.3 SRDF Remote Link Director ...

77 A1 69UP Rev00 ix5.2 Reliability and Availability Features ...5-45.2.1 Rel

CDA 7 5630 Product Manualx 77 A1 69UP Rev00B.5 SCSI Cable Precautions...

77 A1 69UP Rev00 xiTable of Graphics1-1. CDA 7 Cabinet...

CDA 7 5630 Product Manualxii 77 A1 69UP Rev00

Introducing CDA 777 A1 69UP Rev00 1-1 1. Introducing CDA 7This chapter provides an overview of the Bull CDA 7 and highlights itsperformance and reliab

CDA 7 5630 Product Manual1-2 77 A1 69UP Rev001.2 CDA 7 OverviewCDA 7 is a reliable high performance Integrated Cached Disk Array (ICDA)designed for o

Introducing CDA 777 A1 69UP Rev00 1-31.2.1 CDA 7 CapacitiesThe CDA 7 is available with various numbers of disk devices and storagecapacities.CDA 7 ca

CDA 7 5630 Product Manual1-4 77 A1 69UP Rev001.2.2 Channel Connectivity and Host IntegrationThe CDA 7 supports connectivity• To the Bull DPS 7000/GCO

Introducing CDA 777 A1 69UP Rev00 1-51.2.3 Performance FeaturesCDA 7 offers improved performance over conventional Storage Control Units(SCU). These

CDA 7 5630 Product Manual1-6 77 A1 69UP Rev001.2.5 Serviceability FeaturesEvery CDA 7 unit has an integrated service processor that continuously moni

Introducing CDA 777 A1 69UP Rev00 1-71.3 CDA 7 OptionsBull offers the following hardware and software options for the CDA 7. Consultyour Bull System

CDA 7 5630 Product Manual1-8 77 A1 69UP Rev001.3.2 Software OptionsThe following software options are used:• Enterprise Storage Platform (ESP)• Remot

CDA 7 Hardware77 A1 69UP Rev00 2-1 2. CDA 7 HardwareThis chapter describes the main hardware components of the CDA 7 including:• Major Components• Ope

CDA 7 5630 Product Manual2-2 77 A1 69UP Rev00The following figures show the location of the main components of the CDA 7 .Open PositionClosedPositionD

CDA 7 Hardware77 A1 69UP Rev00 2-32.1.1 Component LocationThese components have the following functions:Cooling Fan ModulesContains fans for maintaini

CDA 7 5630 Product Manual2-4 77 A1 69UP Rev00Integrated Service ProcessorDownloads the CDA 7 configuration to the directors and provides diagnostic an

CDA 7 Hardware77 A1 69UP Rev00 2-52.1.2 CDA 7 Block DiagramsThe following figure illustrates the interconnection of the major components of theCDA 7

CDA 7 5630 Product Manual2-6 77 A1 69UP Rev002.2 Operator PanelThis section describes the functions of the various operator panel components.The CDA 7

CDA 7 Hardware77 A1 69UP Rev00 2-72.2.2 Channel Director DisplayThe channel director display is located on the right side of the operator panel.There

DPS7000/XTANOVASCALE 7000CDA 7 5630Product ManualHardware: CDASeptember 1999BULL CEDOC357 AVENUE PATTONB.P.2084549008 ANGERS CEDEX 01FRANCEREFERENCE77

CDA 7 5630 Product Manual2-8 77 A1 69UP Rev002.3.1 FBA Data and Command FormatFBA disk devices store data in fixed sized blocks (typically 512 bytes)

CDA 7 Hardware77 A1 69UP Rev00 2-92.4 Directors and CacheThis section describes the CDA 7 directors and cache capacity.The channel directors and cach

CDA 7 5630 Product Manual2-10 77 A1 69UP Rev00NOTE:For more information, call your Bull Sales Engineer.2.4.4 Disk DirectorThe CDA 7 disk director prov

CDA 7 Hardware77 A1 69UP Rev00 2-112.5 Channel Attachments2.5.1 Ultra SCSI Channel AttachementCDA 7 can attach to Ultra SCSI channels and Fibre Chann

CDA 7 5630 Product Manual2-12 77 A1 69UP Rev002.5.2 Fibre Channel AttachmentsThe CDA 7 Fibre Channel adapter provides an interface between the direct

77 A1 69UP Rev00 3-1 3. CDA 7 Input/Output OperationsThis chapter describes input/output operations between the CDA 7 and a hostsystem.• Integrated Ca

CDA 7 5630 Product Manual3-2 77 A1 69UP Rev00Data ReuseIf a given piece of information is used, there is a high probability that it will bereused shor

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-33.1.1.1 LRU AlgorithmThe directors replace the least recently used data in cache with new data whenn

CDA 7 5630 Product Manual3-4 77 A1 69UP Rev003.1.1.2 Prefetch AlgorithmThe Prefetch algorithm dynamically detects sequential data access patterns to

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-5CDA 7 uses these techniques to enhance its performance:Split Director Functions The director operatio

The following copyright notice protects this book under Copyright laws which prohibit such actions as, but notlimited to, copying, distributing, modif

CDA 7 5630 Product Manual3-6 77 A1 69UP Rev003.2 Elements of a CDA 7 I/O OperationAll I/O operations require a certain response time. An I/O request

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-7DISKDIRECTORCACHEDIRECTORYCHANNELDIRECTORCACHEDIRECTORYCHANNELDIRECTORDISKDIRECTORCACHEDIRECTORYCACHE

CDA 7 5630 Product Manual3-8 77 A1 69UP Rev00In addition to the four types of I/O operation mentioned, CDA 7 performs abackground operation that "

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-93.2.2 Read OperationsThere are two types of read operations: read hit and read miss. The followingf

CDA 7 5630 Product Manual3-10 77 A1 69UP Rev003.2.2.1 Read HitIn a read hit operation (following figure), the requested data resides in cache. It is

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-113.2.2.2 Read MissIn a read miss operation, the requested data is not in cache and must be retrieved

CDA 7 5630 Product Manual3-12 77 A1 69UP Rev00The following figure illustrates the data flow for write operations.CHANNELREAD WRITEASYNCHRONOUSDESTAGE

CDA 7 Input/Output Operations77 A1 69UP Rev00 3-133.2.3.1 Fast WriteIn a fast write operation, the channel director stores the data in cache and send

CDA 7 5630 Product Manual3-14 77 A1 69UP Rev003.2.3.2 Delayed Fast WriteIn a delayed fast write operation, CDA 7 cannot store the data in cache until

77 A1 69UP Rev00 4-1 4. Performance FeaturesCDA 7 offers improved performance over conventional Storage Control Units anddisk device designs. The CDA

77 A1 69UP Rev00 iiiPrefaceThe CDA 7 subsystem is a very reliable high performance Integrated Cached DiskArray (ICDA) designed for online data storage

CDA 7 5630 Product Manual4-2 77 A1 69UP Rev004.4 Fast Write CapabilitiesCDA 7 caches write operations, eliminating the need to write data to the diski

77 A1 69UP Rev00 5-1 5. Managing Critical DataThis chapter discusses the CDA 7 features and options that affect data availabilityand reliability.• CDA

CDA 7 5630 Product Manual5-2 77 A1 69UP Rev00These basic CDA 7 features provide protection against loss of system and dataavailability due to a power

Managing Critical Data77 A1 69UP Rev00 5-35.1.3 Data Protection OptionsAlthough the CDA 7 has standard features that provide a higher level of dataav

CDA 7 5630 Product Manual5-4 77 A1 69UP Rev005.2 Reliability and Availability FeaturesCDA 7 has several features that allow it to maintain data integ

Managing Critical Data77 A1 69UP Rev00 5-5The backup battery subsystem allows CDA 7 to remain online to the host systemfor three minutes in the event

CDA 7 5630 Product Manual5-6 77 A1 69UP Rev00This sophisticated fencing mechanism determines a disk management hardwarefailure at two levels:Level 1:

Managing Critical Data77 A1 69UP Rev00 5-7DISK DIRECTOR 2PROCESSORAPROCESSORBPC PD SC SDPC PD SC SDTO/FROMMEMORYDISKSDISK DIRECTOR 1PROCESSORAPROCESSO

CDA 7 5630 Product Manual5-8 77 A1 69UP Rev00In the following examples, disk director 1 and disk director 2 are paired. EachCDA 7 disk director servi

Managing Critical Data77 A1 69UP Rev00 5-9In summary, dual-initiator provides the following advantages:• Ensures continuous data availability if a CDA

CDA 7 5630 Product Manualiv 77 A1 69UP Rev00For GCOS 7 systems, the CDA 7 subsystem is available with two disk technologiesgiving two different disk c

CDA 7 5630 Product Manual5-10 77 A1 69UP Rev005.2.6 Microcode Upgrades and LoadsMicrocode upgrades, performed by the Product Support Engineers (PSE)

Managing Critical Data77 A1 69UP Rev00 5-115.2.6.2 Dynamic ReconfigurationsCDA 7 supports dynamic reconfiguration activity without disruption to onli

CDA 7 5630 Product Manual5-12 77 A1 69UP Rev005.3 Data Integrity ProtectionCDA 7 preserves data integrity by performing extensive error checking andc

Managing Critical Data77 A1 69UP Rev00 5-135.3.1.1 ParityAll data and control paths have parity generating and checking circuitry that verifyhardware

CDA 7 5630 Product Manual5-14 77 A1 69UP Rev005.3.3 Cache Error Correction and Error VerificationThe disk directors use idle time to periodically rea

Managing Critical Data77 A1 69UP Rev00 5-155.5 MirroringMirroring provides the highest level of performance and availability for all missioncritical a

CDA 7 5630 Product Manual5-16 77 A1 69UP Rev005.5.3 Error Recovery with MirroringShould one volume in the mirrored pair fail, CDA 7 automatically use

Managing Critical Data77 A1 69UP Rev00 5-17In case of disaster occuring at the Production Site, the back-up procedures entitlethe Back-up Site to take

CDA 7 5630 Product Manual5-18 77 A1 69UP Rev00❑ ❑

77 A1 69UP Rev00 A-1 A. Power SequencesThis Appendix provides step-by-step instructions for powering the CDA 7 on andoff. The unit is powered on and o

Preface77 A1 69UP Rev00 vOther EMC publications include:Symmetrix Enterprise Storage Platform Product Guide...

CDA 7 Product ManualA-2 77 A1 69UP Rev004. When the IML procedure completes (all directors show "0F" in their LEDdisplays on their front pa

Power Sequences77 A1 69UP Rev00 A-3A.4 Powering Up After an Emergency ShutdownCAUTION:This unit contains no user-serviceable parts, so it should not

CDA 7 Product ManualA-4 77 A1 69UP Rev00❑

77 A1 69UP Rev00 B-1 B. ESP Installation RequirementsThis Appendix covers the tasks you need to perform when planning or verifyingthe physical configu

CDA 7 5630 Product ManualB-2 77 A1 69UP Rev00B.2 Open Checklists for ESP ConnectionMake sure you discuss with and provide the following host informat

ESP Installation Requirements77 A1 69UP Rev00 B-3Table B-2. Open System Server Host Checklist (2/2)Host Configuration Requirements Host 1 Host 2Will d

CDA 7 5630 Product ManualB-4 77 A1 69UP Rev00B.3 SCSI Cable WorksheetThe physical connection to a Ultra channel interface occurs at the connectors ont

ESP Installation Requirements77 A1 69UP Rev00 B-5B.4 ULTRA SCSI Channel AdaptersSeveral Fast-Wide / Ultra SCSI adapters are available in CDA 7, depen

CDA 7 5630 Product ManualB-6 77 A1 69UP Rev00SDAOperator PanelDesignationsX-BUSPhysicalChannelDesignationsCDABSA-1, SIDE B, PORT ASA-1, SIDE B, PORT B

77 A1 69UP Rev00 G-1GlossaryThis glossary contains terms related to disk storage subsystems. Many of theseterms are used in this manual.AActuatorA se

CDA 7 5630 Product Manualvi 77 A1 69UP Rev00DANGER:A danger warning contains information essential to avoid a hazard that cancause severe personal inj

CDA 7 5630 Product ManualG-2 77 A1 69UP Rev00BBackplaneCard that accommodates the director, cache, and adapter cards.BitThe smallest unit of computer

Glossary77 A1 69UP Rev00 G-3DiagnosticsSystem level tests or firmware designed to inspect, detect, and correct failing components. Thesetests are com

CDA 7 5630 Product ManualG-4 77 A1 69UP Rev00FFast WriteIn Symmetrix, a write operation at cache speed that does not require immediate transfer of dat

Glossary77 A1 69UP Rev00 G-5Index PointThe reference point on a disk surface that determines the start of a track.IOCPInput/Output Configuration Progr

CDA 7 5630 Product ManualG-6 77 A1 69UP Rev00MMediaThe disk surface on which data is stored.Megabyte (MB)The MB2 value is based on the convention: 1 M

Glossary77 A1 69UP Rev00 G-7Record ZeroThe first record after the home address.ReselectThe function that occurs when a target disconnects from an init

CDA 7 5630 Product ManualG-8 77 A1 69UP Rev00SRDF for GCOS 7This is a disaster recovery solution that maintains a mirror image of data in two CDA 7 53

Glossary77 A1 69UP Rev00 G-9VVolumeA general term referring to a storage device. In the Symmetrix subsystem, a volume corresponds tosingle disk devic

CDA 7 5630 Product ManualG-10 77 A1 69UP Rev00

77 A1 69UP Rev00 i-1IndexAActive LED 2-7ActuatorDefinition G-1AdapterDefinition G-1ADTDefinition G-1Alternate TrackDefinition G-1ANSIDe

77 A1 69UP Rev00 viiTable of Contents1. Introducing CDA 71.1 Versions of the Product...

CDA 7 5630 Product Manuali-2 77 A1 69UP Rev00ESP Connection B-2Hardware Checklist B-1Major Components 2-1Mirroring 5-16Overview 1-2Perf

Index77 A1 69UP Rev00 i-3Fencing Mechanism 5-6With Mirrored Configurations 5-9DynamicPath Reconnection G-3Reconfiguration 5-11Sparing G

CDA 7 5630 Product Manuali-4 77 A1 69UP Rev00Definition G-4IDDefinition G-4IMLDefinition G-4Index MarkerDefinition G-4Index PointDefinitio

Index77 A1 69UP Rev00 i-5Cache 4-1CDA 7 4-1Fast Write Capabilities 4-2Multiple Channel Directors 4-1Parallel Processing 4-1RPS Miss Eli

CDA 7 5630 Product Manuali-6 77 A1 69UP Rev00Definition G-7SIODefinition G-7SlotsCache 2-10Soft Error Thresholds 5-13SpeedChannel 4-2SR

Technical publication remarks formTitle : DPS7000/XTA NOVASCALE 7000 CDA 7 5630 Product Manual Hardware: CDAReference Nº :77 A1 69UP 00Date:

Technical publications ordering formTo order additional publications, please fill in a copy of this form and send it via mail to:BULL CEDOC357 AVENUE

BULL CEDOC357 AVENUE PATTONB.P.2084549008 ANGERS CEDEX 01FRANCE77 A1 69UP 00REFERENCE