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Topic: Hard disk drive

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Hard disk

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	Hard Disk Drive Guide - History
		In 1986 the first 3 /12" hard disks with voice coil actuators were introduced by Conner in volume, but half (1.6") and full height 5 1/4" drives persisted for several years.
		This drive holds one gigabyte on a disk which is the size of an American quarter.
		The world's first gigabyte-capacity disk drive, the IBM 3380, introduced in 1980, was the size of a refrigerator, weighed 550 pounds (about 250 kg), and had a price tag of $40,000.
	www.duxcw.com /digest/guides/hd/hd2.htm (615 words)

	Hard disk - Wikipedia, the free encyclopedia
		It is important to note that hard drive manufacturers often use the metric definition of the prefixes "giga" and "mega." However, nearly all operating system utilities report capacities using binary definitions for the prefixes.
		For many years, hard disks were large, cumbersome devices, more suited to use in the protected environment of a data center or large office than in a harsh industrial environment (due to their delicacy), or small office or home (due to their size and power consumption).
		Before the early 1980s, most hard disks had 8-inch or 14-inch platters, required an equipment rack or a large amount of floor space (especially the large removable-media drives, which were often referred to as "washing machines"), and in many cases needed special power hookups for the large motors they used.
	en.wikipedia.org /wiki/Hard_drive (3837 words)

	Hard disk drive Help
		The four main components of a hard disk drive are the platters, head arm, chassis, and the head actuator.
		The majority of computer hard disk drives are permanently stored in an internal drive bay at the front of the computer and are connected with one ATA / SCSI cable and power cable.
		Hard drive is not being detected when using a boot diskette.
	www.computerhope.com /help/hdd.htm (578 words)

	Using disk drive motors
		Disk drive stepper motor can be used as freely rotating motor quite easily by using the stepper motoro controller from the disk drive.
		Disk drive stepper motors consist two coils which move the motor to the desired direction when a current is applied to those coils in correct order.
		The only difference to disk drive system is that the disk drive electronics can buffer the movement signals, so that the controller stores the movement pulses and executes the muvement after the controller has received the last movement pulse.
	www.epanorama.net /circuits/diskstepper.html (3470 words)

	Hard Drive Recovery Group - Disk Repair RAID Data Recovery Service
		Hard Drive Recovery Group specializes in safe, secure data recovery from Mac and PC hard disk drives, including servers and laptop computers.
		Hard Drive Recovery Group is a Florida company that has been recovering data from hard drives and other media since our inception in 1987.
		Drive Recovery - When it comes to recovering your hard disk, remember: safety first.
	www.harddriverecovery.org (875 words)

	Hard disk drive design and technology
		In fact, this drive is not the newest and the best, it just was randomly chosen to make one point - there has been a huge progress in the field of hard disk drive (HDD) technology in the 40 years, and the rate of this progress is just increasing year after year.
		Fierce competition between the drive manufacturers has pushed the cost of one MB of data to a very small number of $1 to $2 per MB making a HDD of several GB in capacity relatively inexpensive and easily affordable by almost anyone.
		The HDD is one of the most important component of the modern PC: no application will run reasonably without the hard drive.
	www.usbyte.com /common/HDD.htm (481 words)

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		Purely optical disk drives often are used as a secondary form of storage, but the computer to which they are connected is likely to use a magnetic storage medium for primary disk storage.
		Data on a disk is read by passing the head back over the surface of the disk; as the head encounters changes in the stored magnetic field, it generates a weak electrical current that indicates the presence or absence of flux transitions in the originally recorded signal.
		When the drive is commanded to move the heads to a specific cylinder, the internal drive electronics use the signals received by the servo head to determine the position of the heads.
	cma.zdnet.com /book/upgraderepair/ch14/ch14.htm (20439 words)

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		Typically, you can install any drive at any position on the cable, although it is good practice to connect the master drive at the end of the cable and the slave in the middle.
		How fast your drive formats depends on a number of factors - the size of your hard drive, the speed of your hard drive and the speed of your computer are the three main ones.
		If you do this to Drive C, you should do it from your floppy disk and don’t forget to use the /S switch again or you won’t be able to boot up from the hard drive.
	www.bootdisk.com /txtfiles/hdd.txt (5662 words)

	' + pPage + ' (Site not responding. Last check: 2007-10-28)
		Drive configuration was discussed in Chapter 15, "Hard Disk Interfaces." For complete configuration information, consult the section that covers the type of drive that you are installing.
		The drive stays in that condition until you redo the LLF of that track, indicate that the track is not to be marked defective, and redo the high-level format that no longer will find the track unreadable and therefore permit those clusters to be used.
		This number includes all the hard drives installed in the system, which means that you can have as many as 24 separate hard disks with one partition each, a single hard disk with 24 partitions, or a combination of disks and partitions such that the total number of partitions is no more than 24.
	cma.zdnet.com /book/upgraderepair/ch16/ch16.htm (14283 words)

	Hard Disk Drive Data Recovery Services at ActionFront.com
		Recovery of crashed hard disks often involves replacing failed or damaged components in a clean environment and using specialized hardware and software tools to create the raw image.
		If the seals on a hard drive must be broken in order to extract data from the drive, ActionFront will re-seal the media upon completion of service with a tamper resistant sticker which the manufacturer will accept for warranty purposes.
		Driving directions with maps can be found here.
	www.actionfront.com /os_hdd.asp (1597 words)

	What is hard disk drive? - A Word Definition From the Webopedia Computer Dictionary
		Hard disk drives (HDDs) for PCs generally have seek times of about 12 milliseconds or less.
		There are several interface standards for passing data between a hard disk and a computer.
		Hard disk drives are sometimes called Winchester drives, Winchester being the name of one of the first popular hard disk drive technologies developed by IBM in 1973.
	www.webopedia.com /TERM/h/hard_disk_drive.html (708 words)

	Hard Disk Drive Connection Procedure
		Of course, the hard disk drive must be physically installed in the system before you begin.
		It is also assumed that you have already decided how you want to configure the hard disk drive, and that you have already set the appropriate jumpers.
		On some drives it can be hard to figure out which end of the header is pin 1, which is why I recommend that you examine the drive before physically installing it.
	www.pcguide.com /proc/config/hdd-c.html (618 words)

	Hard disk drive management software: partitioning manager and partition recovery tool
		Acronis® Disk Director Suite 10.0 is the easiest and most convenient partition manager and hard disk toolkit.
		Disk Editor is a disk drive repair tool that allows you to perform advanced operations on your hard disk drive, such as restoration of boot records and hexadecimal editing.
		Acronis Disk Director is the ideal tool in combination with Acronis True Image backup.
	www.acronis.com /homecomputing/products/diskdirector (453 words)

	Buzzword Definition - Hard Drive/Hard Disk (Site not responding. Last check: 2007-10-28)
		The hard disk is a round, metal platter in the hard drive of the computer; it stores large amounts of information.
		It is sealed into the hard drive and usually installed inside the computer where you can't see it.
		Important: Storage of files on the hard drive is permanent until you delete them, as opposed to storage in memory (RAM), which is temporary.
	www.tekmom.com /buzzwords/zdhdisk.html (74 words)

	X-bit labs - Articles - Seagate External 200GB Hard Disk Drive Review
		The drive is intended to stand upright on a special stand, but it is also functional when lying on its side.
		On the front panel of the drive there is a backup button and two LED indicators (power and disk activity).
		The technical characteristics of the device are determined by the use of a 200GB hard disk drive with a spindle rotation speed of 7200rpm and a cache buffer of 8MB.
	www.xbitlabs.com /articles/storage/display/seagate-200ex.html (592 words)

	Data Recovery, Raid server and Hard Disk data recovery service
		Commonly we provide data recovery for hard disk drive, RAID disk array and server (any raid level such as raid 0, raid 1, raid 0+1, raid 5), CD or DVD, Exchange and Outlook PST mail, SQL database, Iomega Zip cartridge, flash drive, just to name a few.
		It is suffice to say that we are able to recover data from all kinds of failed data media and under all situations, regardless of operating system.
		In most cases, we are able to complete a hard drive recovery and recover all the needed data within 48 hours.
	www.adrc.net (539 words)

	Macworld: News: The hard disk drive turns 50
		On Wednesday, Hitachi Global Storage Technologies, which bought IBM’s hard disk drive business in 2003, said it has achieved an areal density of 345Gb (345 billion bits) per square inch in its laboratories, using a technique that stacks magnetic particles perpendicular to the disk, rather than laying parallel to it.
		At that kind of density, a 2 terabyte (2 trillion bits) disk drive for desktops, a 400GB drive for notebooks, or a 200GB mini-drive like those used in portable music players could be on the market by 2009, Hitachi said.
		With all the disk drives in all the computers, servers and other storage devices available today, businesses aren’t having as much trouble storing data as much as they are organizing, retrieving and analyzing it to expand their businesses.
	www.macworld.com /news/2006/09/13/harddrive/index.php (909 words)

	Virtual Hard Drive - RAM Disk Drive (Site not responding. Last check: 2007-10-28)
		Unlike the chip-based memory in your system, your hard drive still does things the OLD way: it uses a mechanical arm to record data to disk.
		Because the hard drive is the slowest part of a computer system, most users will see dramatic improvements in application speeds when they no longer rely on a mechanical disk for data storage and retrieval.
		Virtual Hard Drive takes a portion of your system memory (RAM) and creates a RAM disk, which functions like a hard drive with dramatically reduced read and write times.
	www.farstone.com /software/virtual-hard-drive.htm (378 words)

	The hard disk drive turns 50 \| InfoWorld \| News \| 2006-09-13 \| By Robert Mullins, IDG News Service
		On Wednesday, Hitachi Global Storage Technologies Inc., which bought IBM's hard disk drive business in 2003, said it has achieved an areal density of 345Gb (345 billion bits) per square inch in its laboratories, using a technique that stacks magnetic particles perpendicular to the disk, rather than laying parallel to it.
		At that kind of density, a 2TB (2 trillion bits) disk drive for desktops, a 400GB drive for notebooks, or a 200GB mini-drive like those used in portable music players could be on the market by 2009, Hitachi said.
		"The first disk drive I saw was the one of the first ones IBM made," said Jim Porter, former publisher of a Silicon Valley disk drive industry report.
	www.infoworld.com /article/06/09/13/HNharddriveturns50_1.html (1504 words)

	Hard Disk Imaging and CD Emulation Software - FarStone Technology (Site not responding. Last check: 2007-10-28)
		Make a complete copy of your hard drive or select partitions to quickly recover from hard drive failure.
		Create a RAM disk to run applications in memory up to 340 times faster than on your hard drive.
		Your “virtual hard drive” will have dramatically reduced read and write times, compared to your physical hard drive.
	www.farstone.com /software (265 words)

	Disk Drive Controllers ( Floppy Disc Controllers, Hard Disc Controllers, Disc Drive Controllers, Disc Controllers, Disk ...
		Download this IT Briefing to learn why there is still a need for tape in the data center and how you can use it to gain a number of benefits.
		SUMMARY: Removable disk cartridges are faster than tapes and easier to manage--but don't dump that tape library just yet.
		SUMMARY: What is driving data growth and how can I manage it? This session, from Storage Decisions New York 2006,; identifies the seemingly sensible approaches that typically fail to deliver the promised results in controlling the data explosion.
	www.bitpipe.com /tlist/Disk-Drive-Controllers.html (554 words)

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