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RAID Storage Systems Apart from RAID Level 1, RAID Level and RAID Level 3 (which are discuss in my previous article RAID Storage Systems) there are few more RAID Storage systems which is discussed in details below. RAID Level 4 This level stores the data on multiple disks and stores the sum of data on a parity disk. If one of the disk crashes the parity disk can be used to recover the data. The available disk space for storing data is higher as compared to disk mirroring. It is preferable t...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Types of SCSI Bus Signaling SCSI bus signaling specifies the method that is used by the SCSI devices to communicate with each other. You should be careful not to connect the devices implementing Single-Ended (SE), low-Voltage Differential (LVD) or High-Voltage Differential (HVD) together directly, as you may damage the hardware. You can connect the single ended signaling (SE) and differential signaling devices using a SCSI expander called a Single-ended to Differential Converter and the LVD and...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Types of SCSI interface There are three standards SCSI 1, SCSI 2 and SCSI 3.An interface is used to connect the various devices. SCSI interfaces come in different forms. Each type of interface supports different bandwidth and operates in different speeds. The connector used by the various interfaces also differs. The SCSI standards specify the features that a SCSI device manufacturer can include on the SCSI hardware. These standards specify the cable length and the data transfer speed betwee...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Configuring the installed Modem Once you have installed the modem and the modem driver, you can configure the modem. Configuring helps to modify the properties of the modem such as the communication port to which the modem is attached or the maximum port speed. It also enables to modify the dialing rules. To configure the installed modem: 1. Select Start -> Control Panel screen appears-> Check the Phone and Modem Options. The Phone and Modem options Dialog Box comes in vision.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Installing an External Modem Installing an external modem is very easy and simple. You just need to connect the modem with the computer and telephone line. To install the external modem: • Place the external modem on the desk. • Locate the serial cable that comes with the modem.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Different Types of Keyboards There are several types of keyboards that are in use today. All these keyboards differ slightly in the layout. The PC/AT keyboard was a part of the PC/AT computer introduced by IBM.The 104-key Windows keyboard offers additional features and ease of operation which were not provided by the 101-key enhanced keyboard. It has therefore replaced the 101-key enhanced keyboard on most personal computers.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +1 votes | 0 comments
Uninterrupted Power Supply is Dead but Fuse not Blown Troubleshoot and taking care of this problem: • If the voltage between pin 3 and 9 is not 5 Volts, then check from mains input side. • Troubleshoot and Check the rectifier input. If it is not 230 Volts AC, then there is problem in mains filter or interruption. • Check the output of rectifier. If it is not 300 Volts DC, then the problem is with bridge rectifier, • If the voltage is less than 300 Volts or transient, then pr...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Troubleshooting SHORT MODE POWER SUPPLY (SMPS) SHORT MODE POWER SUPPLY (SMPS) is Dead, Fan Moves for a Moment and then Stops This problem may occur due to faulty switching transistor circuitry in the feedback section. To troubleshoot this problem: • De-solder both switching transistor and check the fan. • If switching transistors are working properly, then check from Oscillator and error amplifier IC. If there is no problem in IC, then check driver transistors and diodes. • C...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +2 votes | 0 comments
DVD ROM Drives DVD ROM drives can read different types of DVDs. These drives are read-only drives and cannot write or record information on a DVD. Structure of the DVD ROM Drive The front of the DVD ROM drive has a tray that accepts the DVD. It has the Eject button that opens the tray. The Eject button is also used to close the DVD tray. DVD ROM drive has a manual eject button. This button is used in case of emergency, like the tray not opening on account of power failure or device failure. ...
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Troubleshooting the DVD Drive A user can experience many problems with the DVD drive. You have to manage the DVD drive properly in order to avoid problems. In case a problem occurs, troubleshooting the drive will help to a great extent. Troubleshooting the DVD drive is very important, as a faulty drive can damage the DVD. This can cause loss of large amounts of data from a DVD.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
Change Boot Sequence The system checks and loads the files required to work with the system from the storage device, connected to the system. When multiple devices are connected to the system, the system checks for required files from the connected devices in the order specified in the BIOS setup.You will have to change boot sequence for installing the operating system or for booting into the system using the bootable CD.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
NTI Backup Now Promo Code / Discount Coupon Code. NTI Backup Now Review. NTI Backup offers award-winning software products for CD/DVD, hard drives, USB flash drives to enable customers to enjoy music, movies, photos and backup recovery. The company is committed to providing powerful software to OEM's strategic partners and endusers with a sustained focus on innovation, quality, integrity and customer support. The benefits of this company are You can download a free trial of all their p...
Published by Amanda Wilkins 82 months ago in Computer Maintenance | +0 votes | 1 comments
Working of the Floppy Disk Drive The floppy disk drive reads data from a floppy disk just as a cassette player reads music from a cassette. The magnetic particle on the surface of the floppy disk holds the stored data, the head moves over these magnetic particles and reads the data. The data is stored on the sectors and tracks of the floppy disk. The tracks are concentric circles on the floppy disk.
Published by Gazu Lakhotia 82 months ago in Computer Maintenance | +1 votes | 1 comments
Cache Memory Cache memory is a small and fast memory which is placed between the CPU and RAM. It is accessed at a very high speed than the system memory. As a result, the programs which access the same data or instructions over and over run faster. The CPU does not have traverse to the main memory to get the data. It will first access the cache to find the data.
Published by Gazu Lakhotia 82 months ago in Computer Maintenance | +1 votes | 0 comments
How Microprocessor work The microprocessor is a complex chip in the system. Different parts of microprocessor work together to process the data and give the user valuable information. To process the data, microprocessor accepts data from the user, processes the data, and displays the processed information.
Published by Nikhil Agarwal 82 months ago in Computer Maintenance | +0 votes | 0 comments
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