All about Hard Drives

Posted on July 6, 2008 by

A hard disk main function will store the non- volatile data to enter the magnetic medium for the computer. The magnetic material is formulated completely moves in the rotation by a small arm and between the track reads in the platter or writes the data the rigid platter. This is an extremely high efficiency way depositing very most according to because possibly is deposited in the medium considerable amount physics magnetic position, but it has its shortcoming. The most significant shortcoming to the hard disk storage is a speed. The demand time to revolve for the actuation by the speed decided and completely moves actuation to actuate to the essential place. Why is this main reason middle needs the computer system a while dismissal. By now spent the synchronized actuation reading according to. A secondary shortcoming to the hard disk is the electric power expense. It adopts the significant considerable amount strength rotation actuation platter. This shortens the battery life for the notebook computer. Definitely, the actuation possibly rotates the help to save the strength, but this causes once more in the system performance decrease, because actuates to have to rotate the backup works as the need.

Flash Drives: Flash memory is something that is becoming extremely commonplace thanks to devices such as digital cameras and digital audio players. Unlike traditional system RAM, flash memory can store the data in the memory even when the chips have no power. The problem is the cost. They are extremely expensive based on the capacity when compare to things such as a standard magnetic hard drive or standard RAM.

A few companies have announced plans to release flash memory based hard drives. They are often referred to a solid state drives as they have no moving parts like a hard drive but come in a similar form factor for easy installation. Most of these drives costs hundreds if not thousands of dollars for very limited storage space. This makes them impractical for use in most notebook computer systems.

The Hybrid Drive: Just like a hybrid car takes aspects of a standard gas engine with electric motors, a hybrid hard drive takes technologies from a standard hard drive and newer flash drives. Essentially, it is a standard hard drive that has flash memory installed on it as well. The earlier product announcements of the Samsung and Seagate notebook drives have 128MB and 256MB respectively. Standard hard drives have a buffer or cache memory built into the drive to help boost performance. This takes frequently accessed files and stores these blocks into the cache memory to quickly access them there rather than relying upon the movement of the drive heads. The problem is this memory is small (2 to 16MB) and is volatile or erased when the drive is powered down.

A hybrid drive by comparison uses non-volatile flash memory of a much larger size to readily store frequently used files even then the drive is powered off. This is what gives the largest benefit to the hybrid drive. When a system is first booted up or recovers from a suspend mode, the operating system files and programs in memory can be quickly accessed from the flash memory before the drive has spun up. This will greatly reduce the boot times of systems. It also lets the drive spin down more frequently allowing the system to use much less energy and extend a notebooks overall battery life.

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