HD Doctor Blog

August 12, 2010 – Seagate Technology and Samsung Electronics Co., Ltd., announced that they have entered into a joint development and licensing agreement.

Under the agreement, the two companies will jointly develop and cross-license related controller technologies for solid state drive ("SSD") storage devices to attain the high levels of performance, reliability and endurance demanded by enterprise storage applications.

The joint development effort builds on the existing SSD capabilities of each company while combining Seagate’s leadership in enterprise storage technology with Samsung’s flash memory technology specific to 30 nanometer-class MLC NAND. The jointly developed controller will be utilized…

jumper
An electrically-conductive component placed over pairs of pins extending from the circuit board on the hard drive jumper block to connect them electronically. Jumper placement is one method of designating a hard drive as Master or Slave.

KB
Kilobyte. Usually, this is a unit of 1000 bytes. In computer memory, which is partitioned into sizes that are a power of 2, a kilobyte is equal to 2¹⁰ or 1024 bytes.

LAN
Local area network. A system in which computer users in the same company or organization are linked to each other and often to centrally-stored collections…

Though the hard disk drive just crashed, the data might not be lost. Even though the Window’s explorer can’t find the file, most files remain on a computer until written over with new files. There are data recovery specialists who can recover lost data through a variety of mishaps. With a data recovery training course, you can become one of those experts.

Features
Data recovery training courses instruct students on how to revive dead hard drives and extract data from drives that are irreparable. These courses also instruct students on how to recover RAID arrays, flash drives, zip…

I/O
Input/Output. An operation, program, or device that that transfers data to or from a computer or other device.

IcePack™
3.5-inch mounting frame with a built-in heat sink that keeps the 2.5-inch WD VelociRaptor extra cool when installed in a 3.5-inch drive bay.

IDE
Integrated drive electronics. A technology in which interface controller electronics are incorporated into the design of the hard drive rather than into a separate controller. See also PATA.

index pulse signal
A digital pulse signal indicating the beginning of a disk revolution. An embedded servo pattern or other prerecorded information is present on the disk following…

half-duplex
A communication protocol that permits transmission in both directions but in only one direction at a time.

hard drive
An electromechanical device for information storage and retrieval, incorporating one or more rotating disks on which data is magnetically recorded, stored, and read. The principal products of WD.

hard error
An error that is repeated every time the same area on a disk is accessed.

hard sectored
A technique that uses a digital signal to indicate the beginning of a sector on a track.

HDA
Head disk assembly. The mechanical components of a hard…

GB
Gigabyte. WD defines a gigabyte as 1,000,000,000 (one billion) bytes or 1000 (one thousand) megabytes.

GMR
Giant magnetoresistive. An advanced form of head technology.

GPL
General Public License. Free software license which grants recipients rights to modify and redistribute the software which would otherwise be prohibited by copyright law.

GPS
Global positioning system. Provides specially coded satellite signals which can be processed in a GPS receiver to compute position, speed, and time.

FAT
File allocation table. A data table stored at the beginning of each partition on a disk and used by the operating system to determine which sectors are allocated to each file and in which sequence.

FAT32
A file allocation table system with a maximum file transfer of 4 GB and a maximum partition size of 32 GB.

FC
Fibre channel. The general name given to an integrated set of standards being developed by an ANSI-approved X3 group. This set of standards defines new protocols for flexible information transfer. Fibre channel supports three topologies: point-to-point, arbitrated…

A hard disk drive (hard disk, hard drive, HDD) is a non-volatile storage device for digital data. It features one or more rotating rigid platters on a motor-driven spindle within a metal case. Data is encoded magnetically by read/write heads that float on a cushion of air above the platters.

Hard disk manufacturers quote disk capacity in SI-standard powers of 1000, wherein a terabyte is 1000 gigabytes and a gigabyte is 1000 megabytes. With file systems that measure capacity in powers of 1024, available space appears somewhat less than advertised capacity.

The first HDD was invented by IBM in…

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4. HITACHI HDS721050CLA362…

EasyLink™
A WD utility that allows users to locate and set up a drive as a local drive from any computer quickly and easily.

ECC
Error correction code. A mathematical algorithm that detects and corrects data errors.

ECC on the fly
A hardware correction technique that corrects errors in the read buffer before host transfer and without any performance penalties. These error corrections are invisible to the host system because they do not require assistance from drive firmware.

EESA
Enterprise extensions S.M.A.R.T. accessed. An expanded command set that provides SCSI-like control for server environments, optimizing operation…