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Hard Drive Recovery (83)
The following evidence of unreadable sectors on the hard drive appeared in the smartd log:
smartd[798]: Device: /dev/ad5, 15 Currently unreadable (pending) sectors
smartd[798]: Device: /dev/ad5, 15 Offline uncorrectable sectors
Excluding acts of God, problems with your drive or flash stick rarely arise all of a sudden. Typically, there are a number of signs - symptoms of the nascent disease. In this review we are going to talk about which alarm signals should be given attention to and what they might mean.
Mechanical damages to the drive
The first thing you should call your attention to when working with a drive is its visual appearance, this applies especially to portable devices. Make sure that there are no dents on the drive, deformation of the housing and HDA cover, cracks on the electronics board, damage to sealed fabrication holes (a material like aluminum foil) - you should be especially careful with them during the drive installation to, or removal from, the system unit. One of the holes is almost completely closed with the electronics board, so it is difficult to be damaged. But it is not protected by anything on the frontal surface:
HD204UI a 3.5-inch magnetic disk of series of energy-efficient F4EG (EcoGreen). The drive offers high read and write transfers at a short access time. Decently well presents in the practical co-operation with the operating system and applications - PC Mark05 HDD Score. HD204UI consumes very little power. In the idle mode is very quiet, but during read works a lot louder than competing models of the green series.
The new Barracuda Green with a capacity of 2 TB runs at 5900 rev. / Min. Equipped with a buffer of 64 MB cache and SATA 6.0 Gb / s with NCQ.
Samsung SpinPoint 1TB HD103SJ F3 is a quick and inexpensive internal hard drive 3.5 ". The drive is equipped with 32 MB cache and SATA 3.0 Gb / s It offers a great average transfers during read and write at an average access time. The drive is quiet and consumes little energy.
Economical and very efficient, one plate hard drive, from family SpinPoint F. Isn't noisy, the cover is only slightly warm. A very successful design.
The new Barracuda XT is quiet and efficient hard drive with large capacity. Do not heat up excessively and consume the average amount of energy. XT was the first drive, which is equipped with SATA 6.0 Gb / s. After changing the firmware the cc13 on cc11 better cooperates with SATA 3 controller, and with SATA 2 without significant changes.
The hard drive WD RE4 2TB WD2003FYYS it is very efficient in all the tests. Equipped with a large 64 MB buffer and a number of innovations. Unfortunately, the drive is noisy and heats up fast. Energy consumption is also not an advantage. Family of drives Enterprise is primarily dedicated for servers and NAS drives.
WD1002FAEX a 3.5-inch hard drive with a WD Caviar Black series of dedicated for users who need high performance. Drive runs at 7200 rev. / Min, with a large 64-megabytes cache and SATA 6 Gb / s. It is recommended for high performance multimedia computers to edit videos and photos, as well as for the players.
3TB Barracuda 7200.14 drive is addressed to all users of desktop computers. Can offer fast data transfer, low noise of work and low power consumption.
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