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The hard disks today are designed from primary components, as the base (foundation), around which other components are built. For example, improvements in research and development in magnetic data storage require improvements in research and development in design heads. These designs require electronics are "made to measure" for the device. The hard drives were "adjusted" to the properties of storage media heads and read / write - in a way similar to how a radio conforms to a specific radio frequency; hard drives are in line to complement the signals read data from the dishes.
Manufacturers of hard drives are lots of very many devices so that there are similarities between models of devices. However, the Code Review (software disk read-only property of the manufacturer that is used by the electronics to manage and operate the hard disk) changes frequently within the same model and lot. Innovation in the hard disks requires that the devices are updated constantly. All this requires extensive training in electronics and computer to work with these storage devices, not to mention the challenge of finding adequate mechanical components.
Hard Drives
Despite the obvious importance so that these devices have in their systems, many users neglect to maintain their hard drives. Its hard drive is very likely to be damaged by many causes. Therefore:
* Protect your unit and rattling blows. Too often, when someone installs, moves or reconfiguring hard drives, so inadvertent hits them thus damaging equipment that can cause data loss. Damage to the internal hard drives are not always immediately perceptible
* Beware of electrostatic energy. Static electricity, an invisible enemy, can wreak havoc on the wiring of chips and transistors Inside Your Computer. Since it is so easy to cause a discharge of static electricity by touching a hard disk.
* Acclimation of the room in which the equipment is stored. Check the temperature, humidity, altitude and vibration. All these variables can lead to permanent or intermittent failure of hard drives.
* Carry out regular reviews of their hard drives. The software from Ontrack Data Advisor conducts periodic reviews of its system, notice of potential problems. It is recommended that run Data Advisor once a month. (Get a free version).
* Place your hardware in a safe place. When changing the location of your computer (a table to the ground, or a vertical to a horizontal position) should always make a backup of your hard drive. An accidental blow in that unit could make the heads operate differently with the result of failures read or write on the disc.
RAID Systems
The RAID controllers add a new level of complexity and potential loss of data through its automated tools to rebuild. All RAID controllers have their proprietary software contains functions to perform different types of RAID reconstruction if a device fails or parity becomes incoherent. These reconstructions can be very dangerous and can cause data become irrecoverable once they are implemented.
A faulty driver sometimes can be replaced with another of exactly the same type without causing damage, but any subsequent reconstruction regardless of make or model of the controller may cause a severe loss of data, as described above.
By far the worst tool RAID is a scrub or low-level formatting. Some centres RAID manufacturer's technical support suggested to be used by default this kind of reconstruction to create a new 'array', but once it has implemented the tool normally there is no possibility of recovery, because each bit of each device will been reorganized. Generally there is an alternative to low-level formatting or scrub equally good at running a RAID reconfiguration, in which case it will still be option for recovering data if they later need exists to obtain data originating.
The best advice is to be very careful when a fault occurs RAID and not go beyond a single reconstruction of a device failed. Bug reconstruction initial attempts to carry out additional reconstruction or reconfiguration, or forcing the devices on-line. generally only contribute to a higher loss of data.
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