Thursday, February 14, 2008

Hard Drives

Hard Drives
Hard drives are the storage medium in desktop and laptop computers as well as all servers and mainframes throughout the world A hard drive is a piece of hardware that reads and writes data on a hard disk Hard disk drives for personal computers generally have seek times of about 12 milliseconds or less Many hard drives improve their performance through a technique called caching There are several interface standards for passing data between a hard drive and a computer The most common are IDE and SCSI Although removable disks encased in cartridges use the same hard disk media and a similar drive technology they are mostly called removable drives rather than hard drives. IDE Integrated Drive Electronics a hardware interface widely used to connect hard disks optical disks and tape drives to a PC Introduced in 1986 with 20MB of storage capacities increased a thousand fold in less than two decades Compared to the SCSI interface IDE has been the more economical choice IDE is a standard electronic interface used between a computer motherboards data paths or bus and the personal computers hard drive
SCSI was developed as an industrywide standard It is used on PC Servers and was used on Macintosh but it was also designed to handle the heavy load of performance critical central servers that cost hundreds of thousands of dollars It is better than ATA but more expensive SCSI is a parallel interface standard used by motherboards data paths or bus and the personal computers hard drive SCSI interfaces provide for faster data transmission rates up to 80 megabytes per second than standard serial and parallel ports which is why SCSI hard drives are generally more expensive than IDE hard drives Hard Drives comes in a range of different prices You can find many discount in hard drives from as little as Rs 800 to over Rs 4 00000 Price ranges for hard drives general depend on the manufacturer and the amount of gigabytes offered with the hard drive There are many quality manufacturers of hard drives like Toshiba Western Digital Quantum Maxtor Seagate Maxtor Hatachi Fujitsu and many others A gigabyte derived from the SI prefix giga is a unit of information or computer storage equal to one billion that is a thousand million bytes One gigabyte is roughly equal to 18 hours of MP3 music at 128 kbit s One gigabyte is roughly equivalent to 11 hours 40 minutes of Flash video at 450x370 A gigabyte is a measure of computer data storage capacity and is roughly a billion bytes Todays hard drives are much less expensive than they have ever have been Buying a 100 GB is very affordable today but as earlier as 6 years ago it was unheard of ..In internal hard drive or external hard drive no matter the type of computer you have An internal hard drive must be properly installed within the housing of the computer To properly install an external hard drive your computer must connect with a 6pin or 4pin FireWire port to transfer the data between the motherboard

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