39&

Abbreviation for polyvinyl chloride.

4,&

Abbreviation for quarter-inch cartridge.

5$0

Acronym for random-access memory. The computer’s primary temporary stor- age area for program instructions and data. Each location in RAM is identifiedby a number called a memory address. Any information stored in RAM is lost when you turn off your computer.

5$,'

Acronym for redundant array of inexpen- sive disks. This phrase was introduced by David Patterson, Garth Gibson, and Randy Katz at the University of California at Berkeley in 1987. The goal of RAID is to use multiple small, inexpensive disk drives to provide high storage capacity and performance while maintaining or improving the reliability of the disk subsystem.

Patterson, Gibson, and Katz described five different methods, which are known as RAID levels 1 through 5. Each level uses one or more extra drives to provide a means of recovering data lost when a disk fails, so that the effective failure rate of the whole disk subsystem be- comes very low.

Recently, Katz has defined a sixth meth- od, RAID 6, which improves reliability even further, and a configuration that pro- vides no data recovery has popularly become known as RAID 0.

5$,'￿￿

RAID 0 is commonly called striping. This was not originally defined as a RAID level but has since come into popular use. In this array configuration, data is written sequentially across the available disksand no redundancy is provided. RAID 0 config- urations provide very high performance but relatively low reliability. RAID 0 is the best choice when DSA controller cards are duplexed. See also striping.

5$,'￿￿

RAID 1 is commonly called mirroring. RAID 1 is the best choice in high-availability applications that require high performance or relatively low data capacity. See also mirroring, RAID 10

5$,'￿￿

RAID 3 is commonly called striping. RAID 3 uses striping with one drive dedicated to parity to protect data. Data is striped such that a single transaction requires ac- cess to all drives. See also striping.

5$,'￿￿

RAID 4 is commonly called guarding. It uses data striping, like RAID 3, but adds a single, dedicated parity drive. The parity data stored on this drive can be used to recover data lost from a single failed drive. RAID 4 configurations write data slowly because parity data has to be generated and written to the parity drive, and the generation of the parity data frequently re- quires reading data from multiple physical drives. See also guarding and striping.

5$,'￿￿

RAID 5, like RAID 4, is commonly called guarding. RAID 5 is identical to RAID 4, except that the parity data is distributed evenly across all physical drives instead of a parity drive. In configurations using a large number of physical drives in which a large number of simultaneous small write operations are being performed, RAID 5 offers potentially higher perfor- mance than RAID 4. RAID 4 and RAID 5 configurations are appropriate in high- availability applications where performance is less critical or where high data capacity is required. See also guarding.

5$,'￿￿￿

RAID 10 is a mirroring technique in which data is duplicated across two identical RAID 0 arrays or hard-disk drives. All data on a physical drive in one array is duplicat- ed, or mirrored, on a drive in the second array. Mirroring offers complete redun- dancy of data for greater data security. See also mirroring, RAID 1, and striping.

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4350 specifications

The Dell PowerEdge R4350 is a versatile 2U rack server designed to meet the demands of modern data centers, particularly those requiring a compact yet powerful solution. Tailored for businesses seeking efficient performance in various applications, this server balances exceptional processing power, memory, and storage flexibility.

One of the standout features of the R4350 is its dual Intel Xeon Scalable processors, which dramatically improve performance with up to 28 cores per processor. This scalability enables enterprises to handle a wide range of workloads, from virtualized environments to in-memory databases and analytics. The server supports up to 1.5TB of DDR4 memory, allowing for extensive data processing and quick access to information, a crucial factor for operations requiring high availability and responsiveness.

The R4350's flexible hard drive configuration further enhances its appeal. It accommodates up to ten 2.5-inch drives or four 3.5-inch drives, providing users with various storage options to suit different requirements. With support for both SAS and SATA drives, users can prioritize performance or capacity, depending on their specific use cases. The server also supports RAID configurations, contributing to data integrity and redundancy.

In terms of connectivity, the Dell R4350 features multiple PCIe slots, enabling users to expand their systems with additional I/O options or enhance capabilities with accelerator cards, such as GPUs, to support high-performance computing workloads. The integrated 10GbE networking capabilities ensure fast data transfer and seamless integration into existing infrastructures.

The R4350 is designed with manageability and security in mind. Featuring Dell EMC OpenManage technology, it offers a user-friendly interface for monitoring and managing hardware components efficiently. Security is bolstered through features like Secure Boot and hardware TPM, providing peace of mind regarding data protection.

Additionally, the PowerEdge R4350 integrates advanced thermal management technologies for efficient cooling, ensuring optimal performance even under heavy workloads. Its compact 2U design allows for easy installation in various rack environments, maximizing space utilization without sacrificing processing capabilities.

In summary, the Dell PowerEdge R4350 combines powerful processing, expansive memory, versatile storage options, and advanced management capabilities, making it a formidable choice for businesses looking to enhance their IT operations. With its focus on performance, reliability, and security, the R4350 stands out as a robust solution for the ever-evolving demands of modern computing.
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