ハードディスクはどうやって動いているのか

July 24th, 2015


画像元: windowsitlibrary.com

ハードディスクには磁気を帯びた数枚のプロッターがあります。 プロッターがついている軸がこれらを高速に回転させ、リード/ライトヘッドが読み/書きする情報をプロッター上で探します。 ハードドライブの有効性はどれ程の量が未使用であるか、フラグメントの割合やデータ転送率により、それはコネクションの種類とドライブの回転数によって変わってきます。ハードドライブを購入する際に、二つの製品、例えば一つの160GBドライブと 二つの80GBドライブの値段を比べるとします。二つのハードドライブがあれば、一つが悪くなっても全てが無くなる訳ではありません。しかし今日のハードドライブは、乱用しなければ、長持ちするハードウェアで、 面倒な事の無い長期に渡るデータ保管を約束します。

JTS Corporation

July 17th, 2015

JTS corporation, which is base on San Jose, California, was a producer of IDE hard drive for personal computers. In 1994 Jugi Tandon founded JTS Corporation. The company originally concentrated in making on a new 3″ form-factor drive for laptops. The three inches feature accepted a larger drive storage capacity for laptops with their technology.

Compaq Computers was qualified JTS’s drives and incorporate it with their laptops. They became the supplier of bargain basement priced with good-performance hard drives with 5400 RPM. They produced their product in the southern part suburb of Madras City. In this case reputations on products were noticeable. Upon merging with Atari on February 1996, and getting cash from it, JTS filed for Bankruptcy by December 1998.

Data Transfer Rates

July 10th, 2015

4.jpgData written on a hard drive is encoded not as human readable language but rather a series of 1s and 0s that represent a Bit or Binary Digit. This is the only language that the computer understands that is why it is commonly referred to as machine language. Commonly, files have a property size of xx KB (kilobytes) or xx Byte, a byte consists of eight bits which represents a character. Data transfer rates is the velocity at which data is transmitted from one device to another.

In IDE hard disk specifications, it is commonly seen that a data transfer rate is xx ms (microsecond). Essential, the lower the data transfer rate, the faster the hard disk can read and write on the media and retrieve data that is requested by the user or a software application. The data transfer rate allows for faster execution of tasks sent by the user to the computer system.

To Slave or Not to Slave

July 3rd, 2015

This is a manually set designation done on an IDe hard drive that tells the computer system whether the drive is the boot drive or primary or secondary. This is vital for it tells your CPU where the boot drive is that contains the Operating system(usually windows). This can be determined with a quick check on the label of the drive where the pin designations are shown.

Setting this, you take a look at the IDE hard drive(preferably when it is still not installed on the computer system) in between the IDE cable and the power supply. There are normally three pairs of pins, one for master another for secondary or slave and the last one is for auto-detect with the computer system determining on it’s own which is which.

ハードディスク容量のアップグレード Part 1

June 26th, 2015

誰もがより大きなハードディスク容量を求めています。予算に余裕があるのならぜひ実現してみてください。ほんの少しのアップグレードで快適になりますよ。IDEハードディスクをアップグレードするには、古いディスクをはずして容量を増やすための新しいディスクを取り付けるだけ。どちらの作業もちっとも難しくありません。

どのIDEハードディスクにも標準タイプのピンとソケットが採用されています。ハードディスクを取り換えるだけなら、手順はごく簡単です。ディスクからIDEプラグと電源プラグを引き抜いて、ハードディスクドライブを筐体に固定しているネジをはずして新しいハードディスクを差し込むだけです。

Hard Drive Myths part 3

June 19th, 2015

The truth is current design of hard disk’s head actuators are not power-driven by any motor. Previous design of the head actuators are actually powered by a stepper motor. But currently head actuators use the voice coil instrument that uses electromagnetic power to stir the heads. In short, head actuators don’t have a motor to fail and not powered by any mechanical motor.

In addition, take note that head actuators’ automatically when there are power cuts meaning it is not an active process. Head actuator uses spring to park itself. The spring retracts the actuators when the power is cut while it moved against the spring tension when active.

Formatting Hard Drive Myths part 5

June 12th, 2015

It is true that formatting will eliminate the bad sectors and will be replace with good sector on the spare section that part of every hard disk. But the performance will suffer because the heads will seek on the spare section in replacements of bad sectors. Bad sectors are signs of bad hard disk. Basically, it means that there something wrong with the hard disk. Bad sectors create debris on the platter and can cause to damage the hard drive.

Additionally, spare sectors are limited on any hard drive. Then once the hard disk runs out of spare sectors, formatting can not replace those bad sectors.

How Much is Enough

June 5th, 2015

harddrivesThe ability to connect a specific hard drive is generally limited but he architecture of the motherboard and bios as a matter of fact with most today limited to 500GB in capacity. Attach a larger drive and you may not be able to utilize the full capacity of the drive which you may find out in the detected drive displayed within the BIOS setup screen. Though most motherboards now use auto detect, detecting and getting the information about the hard drive from the internal electronics, there was actually a time when you had to know the parameters of the drive for one to mount it and use it properly. IDE today has become an older standard, replaced by SATA which has faster transfer rates and other speedy attributes. They also have a slimmer connector that lessens the restrictive effect the former 80-wire flat cable had on the overall computer system. Continue reading »

Upgrading? Better destroy all data on your Drive

May 29th, 2015

Many companies observe strict policies regarding computer hardware and the data they contain. But many of us common folk fail to observe the same and sometimes end up in trouble for such irresponsible acts. May they be old digital photos or lewd email backed up on your hard drive, all of these can be used for wrongdoing and should be dealt with in the proper manner.
The simplest way to destroy data is to do a software hard format using the Operating system’s long format option. Going a step further, you could get your drill and drill a few holes through the whole thing just to be safe and then toss it into the recycling bin to be made into new drives. But be safe and do wear proper safety gear and clamp down the drive in a vise to prevent injury.
Keeping information out of the wrong hands is the responsibility of everybody and it does not hurt to be extra careful.

Formatting Hard Drive Myths part 4

May 22nd, 2015

There is a myth that bad sectors can be repaired once it was reformatted. A bad sector is an area where the hard disk cannot be written nor read properly. It may due to program-related problems that result in a logical bad sector. Bad sectors that are software related can be restores by formatting using any logical repair utility.

But in case the problem is due to eroded media or the hardware is directly damaged. Such physical bad sectors can no longer be repaired using any logical repair utility and formatting it will not restore them. Formatting them, however, can replace those bad sectors with spare sectors.