Server Hardware Chapter 22 Release 22/10/2010 powered by dj Objectives Explain the difference between a server and PC Identify the components of a server Explain the different types of server Chapter 2 Release 22/10/2010 Slide 2 of 25 powered by dj Server To provide high availability and redundancy, hardware used in servers are different as compared to a normal desktop. Server is a device with a set of hardware and software, provides various services to other machines or computers on the network to do some certain tasks. Servers are dedicated, high-reliability computers that are generally used to support multi-user business applications Chapter 2 Release 22/10/2010 Slide 3 of 25 powered by dj Question for GD Time Limit – 4 Mins What is a hardware based server? Chapter 2 Release 22/10/2010 Slide 4 of 25 powered by dj Difference between Server and PC - I Server PC Uses Xeon or Itanium processor in Uses single desktop processor multiple numbers Multiple Hard disks are used Single hard disk is used Higher memory capacity and in Lower memory capacity and less multiple numbers e.g. 2 or 4 or 8 in number e.g. 1 or 2. Network capability is better Normal network capability Serves more number of users e.g. Are built for individual user 100 or 500 or 1000 Structure is more advanced and Simple structure complex Chapter 2 Release 22/10/2010 Slide 5 of 25 powered by dj Difference between Server and PC - II Requires redundant system to cope Doesn’t have redundant system. with failure. Can run 24*7 Operate for normal hours e.g. 8 hours per day Supports hardware RAID More number of expansion slots More number of cooling fans e.g. 4 or 8 Huge size and weight Can be tower or rack or blade model More number of SMPSs e.g. 2 or 3 which are hot swappable Doesn’t support RAID Less number of expansion slots Less number of cooling fans e.g. 1 or 2 Less size and weight Only tower model Single normal SMPS is used Chapter 2 Release 22/10/2010 Slide 6 of 25 powered by dj Difference between Server and PC - III Hot swappable hard drives are used Cannot be assembled Difficult troubleshooting Requires more power and cooling More noisy because of multiple fans Less down time and higher availability and fault tolerance Manufactures are IBM, HP, Sun and Dell Cost starting from Rs. 40000 Chapter 2 Release 22/10/2010 Normal hard drive is used Can be assembled Easy troubleshooting Requires less power and cooling Less noisy More down time and no fault tolerance Manufactures are HCL, Wipro, Lenovo, and Compaq Cost starting from Rs. 20000 Slide 7 of 25 powered by dj Question for GD Time Limit – 4 Mins What is the difference between a server and a PC? Chapter 2 Release 22/10/2010 Slide 8 of 25 powered by dj Types of Server Entry Level Mid Range High End Chapter 2 Release 22/10/2010 Slide 9 of 25 powered by dj Entry Level Server Mainly used for running server applications such as file sharing, print sharing, Web serving, low volume email and business automation applications. Chapter 2 Release 22/10/2010 Slide 10 of 25 powered by dj Question for GD Time Limit – 4 Mins Example of an entry level server? Chapter 2 Release 22/10/2010 Slide 11 of 25 powered by dj Mid Range Server A medium sized server which consists of a platform hardware and operating system together to support the operating environment for applications. Mid range server comes with a built in database to serve a smaller group of users. Chapter 2 Release 22/10/2010 Slide 12 of 25 powered by dj High End Server Provides a web hosting environment with high server availability such as high performance, reliability and high speed. Designed to achieve supercomputer level of performance. Chapter 2 Release 22/10/2010 Slide 13 of 25 powered by dj Question for GD Time Limit – 4 Mins What are the different types of servers? Sl. Types of Servers Chapter 2 Release 22/10/2010 Slide 14 of 25 powered by dj Components of a Server - I RAID Controller - A disk controller card that supports one or more RAID configurations. RAID controller can either embedded in the motherboard or come in the form of PCI expansion cards. Chapter 2 Release 22/10/2010 Slide 15 of 25 powered by dj Components of a Server - II SAS/SCSI Hot Swappable HD - SAS/SCSI hot swappable drives allow users to remove the faulty hard disk and insert a new disk without doing power off the server. Most of the modern server has the ability to use hot swappable hard disks along with disk array. SAS/SCSI hot swappable HDs are usually located in a caddy or tray inside the server Chapter 2 Release 22/10/2010 Slide 16 of 25 powered by dj Components of a Server - III Backplane - Circuit board which connects several connectors in parallel to each other. Each pin of the connector connects with corresponding pin of all other connectors and forms a computer bus. Server commonly has backplane to attach hot swappable hard drives. Chapter 2 Release 22/10/2010 Slide 17 of 25 powered by dj Components of a Server - IV SCSI Cable - SCSI cables are used to connect and transfer data between computer and peripheral devices such hard disks. SCSI cable length range from 6 meters to 25 meters. ECC RAM - Used for detecting and correcting error during storage and transmission of data in server. There are certain kinds of RAM which use this technique to correct the data errors. Chapter 2 Release 22/10/2010 Slide 18 of 25 powered by dj Components of a Server - V Fan - Used to remove the heat produced inside the server. Server fans are located inside a bay. Commonly server contains 3, 4, 6 or 8 fans to cool the system. Hot Swappable SMPS - Two or more SMPS are attached to a single machine. If any one of the SMPS is not working, other one takes the control. Chapter 2 Release 22/10/2010 Slide 19 of 25 powered by dj Group Activity Time Limit – 5 Mins Draw a window pane on different components of a Server. Chapter 2 Release 22/10/2010 Slide 20 of 25 powered by dj Practical Activity Time Limit – 49 Mins Show these components to the students and get the activity 1 mentioned in this chapter done from the students. Chapter 2 Release 22/10/2010 Slide 21 of 25 powered by dj Summary – I Server is a device with a set of hardware and software, which provides various services to other machines or computers on the network. Main features, which differentiate a server from other computer system are performance, scalability, availability, reliability and redundancy. Major components of server are RAID controller, ECC memory, Backplane, Fans, SCSI Hot swappable HDD, SCSI cables and Hot swappable SMPS. RAID controller is a disk controller card that supports one or more RAID configurations. SAS/SCSI hot swappable drives allows the user to remove the faulty hard disk and insert a new disk without doing power off the server. Server commonly has backplane to attach hot swappable hard drives. Chapter 2 Release 22/10/2010 Slide 22 of 25 powered by dj Summary – II SCSI cables are used to connect and transfer data between computer and peripheral devices such hard disks. ECC RAM is used for detecting and correcting error during storage and transmission of data in server. Entry level servers are used to run several server applications such as file sharing, print sharing, Web serving, low volume email and business automation applications. Mid range server is used for more intensive database storage and retrieval functions. High end server provides a web hosting environment with Chapter 2 Slide 23 of 25 high server availability. Release 22/10/2010 powered by dj Explorative Work Refer to Internet, reference books or magazine to get the information. Do not copy the information provided in this text book. Consult your faculty for further guidance. Server Sl. Make 1 2 3 4 5 Specification Type Warranty Chapter 2 Release 22/10/2010 RAID Support Approx. Cost Slide 24 of 25 powered by dj Mind Map Draw a mind map to summarize this chapter Chapter 2 Release 22/10/2010 Slide 25 of 25 powered by dj