IBM 32H3816 manual RAID-1

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SSA RAID Adapter Installation and User's Guide.

RAID-1

C.2.2 RAID-1

RAID-1 is also known as mirroring or dual copy. It provides redundancy with better performance than a single disk, but requires real disk capacity of two times the data size.

A RAID-1 array has two disk drive members. If the members have different capacities, the resulting RAID-1 array has the capacity of the smaller member. Each data block of the array is written on each of the two members.

If one member fails, operations continue, to the good member. Performance is degraded for read operations (because read operations cannot now be shared between the two members), and improved for write operations (because only a single member is written). So a mixed workload may not show any change in overall performance. When a member returns or it is replaced (either manually or automatically by the hot-spare mechanism), a rebuild occurs. This rebuild is performed in parallel with any activity to the array.

_ Copyright IBM Corp. 1996

C.2.2 - 1

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Contents Document Number S32H-3816-00 Part Number 32H3816 Cover Book CoverProduct it supports, be Edition Edition Notice Contents Table of Contents FRONT1 Safety Information Safety Information Copyright IBM Corp FRONT1 SSA RAID Adapter Installation and Users Guide Preface About This Book PREFACE.1 How This Book Is Organized PREFACE.2 Related Publications Introducing the SSA RAID Adapter SSA Adapter Card RAID Operating Systems Before Installing the Adapter Installation Requirements Installing an SSA RAID Adapter Installing the Adapter Card Connecting the Disk Drives Configuring the Disk Drives Installing an Operating System Installing the Device Drivers and Utility Programs Selecting Your Boot Device Configuring SSA Subsystems Vyymmdd Running the Configuration UtilityAccepting New Disk Drives Creating an Array Non-VolaArray name Status Serv Bus Service Aids Vyymmdd XX Version Main M+ Bus Device YAdapter New Disks RAID-0 Arrays Free Resour List of RAID-X ArraysHot a Main M+ Bus + QRej S Non aSSA RAID Adapter Installation and Users Guide F1 Help F9 FlashOn Attaching ResourcesMain Menu New Disks List of System Resources System ResoSSA UID/Array Name StatusCANUID111 Dealing with Disk-Array Problems Basic Problems Array Problems Blank Disk Service Aids New Disks LinkF3 Certify ServiceMode F5 Diagnostics F9 FlashOn Changing Failed Disk DrivesSSA RAID Adapter Installation and Users Guide Performing Other Disk-Array Tasks Select Hot-spare disks Defining a Hot SpareHo2 SSA Configurator and Service Aids Vyymmdd Version Main M+List of Hot-spare Disks No1Viewing the Physical Configuration Viewing Resources and Their Attributes Fre View Physical Disk Sys+ Main Menu New+Attr1aaaa Changing Array Attributes Xxxxxxxx Yyyyyyy Abou Bus View Adapter VPD Disk Service Aids Escape Exit Enter SelectDevice Y Slot Z Adapter New Disks RAID-0 Arrays Free Resour RAID-5 a List of RAID-X ArraysEscape Exit Enter Select F1 Help F9 FlashOn F10 FlashOff Exchanging a Member of an ArraySSA Adapte Att View RAID-X ArraysSystem Res+ Candidates for RAID-X Arrays UIDxxxxx StatusDeleting an Array FF00xxxx Qqqqqqq U.S Canada Markham Montreal Toronto Getting the Latest InformationAppendix A. Multiple-Adapter Installations Appendix B. SSA RAID Adapter Service Request Numbers Not exchange any Dram Modules yet Failed 41064 a 64 MB Dram moduleSSA RAID Adapter Installation and Users Guide Dffff SSA adapter microcode has Call for service HungSSA Loop Configurations that Are Not Valid Subtopics Serial Storage Architecture SSA RAID Functions Appendix C. Introducing SSA and RAIDSubtopics SSA Loops and Links Rules for SSA Loops Serial Storage Architecture SSASubtopics Loops and Data Paths SSA Loops and LinksLoops and Data Paths SSA RAID Adapter Installation and Users Guide Loops and Data Paths Copyright IBM Corp 1.1 Rules for SSA Loops Subtopics RAID-0 RAID-1 RAID-5 Hot Spares Disk Array States RAID FunctionsRAID-0 RAID-1 RAID-5 Hot Spares Disk Array States Good State Exposed State Degraded State Rebuilding State Offline State Appendix D. Product Warranty and Notices Machine SSA RAID Adapter for PC Servers Warranty Period* Three yearsProduction Status IBM Warranty Warranty Service Extent of Warranty Limitation of Liability SSA RAID Adapter Installation and Users Guide IBM Communications Statements Federal Communications Commission FCC Statement This equipment is Type 1 Data Processing Vcci StatementRadio interference. VCCI-1 International Electrotechnical Commission IEC Statement Avis de conformité aux normes de lIndustrie Canada Industry Canada Compliance Statement United Kingdom Telecommunications Requirements EC Council Directive Hinweis Radio Protection for GermanyGood state C.2.5.1 Hot spares defining 5.1 function C.2.4 Installing Write while exposed C.2.5.2 Information, latest 6.0 information, more 6.0 installing

32H3816 specifications

The IBM 32H3816 is a notable component in the landscape of computing hardware, particularly designed for high-performance applications within IBM's extensive lineup of server and storage solutions. This specific model serves as a memory module, contributing significantly to the operational efficiency and performance capacity of various IBM systems.

One of the main features of the IBM 32H3816 is its substantial memory capacity, typically offering up to 16GB of RAM. This amount of memory is crucial for handling large datasets and running multiple applications simultaneously, making it ideal for enterprise-level servers, databases, and virtualization environments. The module's capacity supports the growing demands for resource-intensive applications, setting a foundation for better multitasking and system responsiveness.

Another key characteristic is its memory type, which is DDR3 SDRAM. This technology provides faster data transfer rates compared to its predecessors, ensuring a smoother and more reliable performance. DDR3 allows for improved bandwidth, enabling quicker access to data stored in memory. Its lower power consumption is also a significant advantage, making the IBM 32H3816 a cost-effective choice for businesses looking to optimize energy usage while maintaining high performance.

The memory module is designed with advanced reliability features, such as ECC (Error-Correcting Code) capability. ECC ensures that data integrity is maintained by detecting and correcting common types of internal data corruption. This feature is particularly important for mission-critical applications where data accuracy is paramount. Users can expect enhanced stability and reduced risk of system crashes that could lead to data loss.

IBM has engineered the 32H3816 with temperature and voltage tolerance in mind, which makes it suitable for use in various server configurations. These characteristics ensure that the module functions optimally even in challenging environments, thus prolonging its lifespan. The compatibility with multiple IBM server models also adds to its versatility, enabling businesses to upgrade existing systems seamlessly.

In conclusion, the IBM 32H3816 memory module stands out for its robust capacity, advanced technologies, and reliability features. It is an essential component for organizations requiring high-performance computing solutions, offering a blend of efficiency, speed, and stability. With the ongoing evolution of IT demands, investing in quality memory modules like the IBM 32H3816 can significantly enhance overall system performance and productivity.
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