Hard drive (HDD) stands for the first letter of 3 from Hard Disk Drive, a device for storing information. Composed of two basic components:
Hard drive (HDD) stands for the first letter of 3 from Hard Disk Drive, a device for storing information. Composed of two basic components: the disks (platters) coated inside the magnetic layer and the read / write heads. For now, the number of HDD platter contained within 1 to 5 and the fixed rotational speed from 3600 to 7200 r / min (rpm: rounds per minute) depending on the type of hard drive. Even some or SCSI hard disk drives are included to speed up 10000-15000 r / min. Due to the rotational speed so fast HDD is covered by an outer casing is sealed with the aim not to fall into the atmosphere and can withstand minor collisions.
On the market today there are two types of hard drives that use Parallel ATA (or ATA) and Serial ATA (or SATA), but usually only ATA drives to provide the machine with old mainboard, the mainboard is new are supporting the SATA hard drive, the SATA hard drive speed information exchange is much larger than the parallel ATA drive its price is not more expensive than ATA hard drive is much, usually just 1-for $ 2. Compared with the SATA ATA reveals many advantages, can SATA hot plug, cable connecting the compact, space saving allows the case. Do not stop there, SATA II has appeared with the bandwidth of 300MB / s (a record number of quotes can be 3Gigabit / s or 3Gb / s), twice the SATA (150MB / s).
Most hard drives on the market today have a 7200rpm speed (7200 rpm), this rate allows the hard drive can be accessed with greater information flow.
Cache (Cache): a temporary store in the data access, caching large HDD access speed will be higher than the data.
Hard drive capacity is the information storage capacity of the hard drive, the hard drives are now capable of storing very large, typically between 80GB or more, I personally recommend that you select the hard drive has a large capacity a little, about 160GB or more, as the price of hard drives is pretty cheap now, you have to spend $ 49 to buy a 80GB hard drive, while adding just spent about $ 17 more, you'll have a drive 160GB (80GB add more), you can see 80GB but was too broad to meet long-term working time (a few years) without worrying about lack of storage space you should spend some money to buy a larger hard drive necessarily. As an IT student I think you need some data will not be stored is small, and moreover in a long time. Hard though it is not inexpensive many decisions to performance of the whole system, but what it contains is important, it contains all the results of your work, and many of your other data in a long time, so you do not hesitate to spend some money to invest in this equipment. And to consider upgrading the hard drive is not an entirely rational decisions about the economy, if you buy a 80GB hard drive, and you feel lack, you decide to buy a 80GB hard drive and more the total amount you have to invest is 49x2 = $ 98 and you have 160GB capacity, while at the beginning if you decide to buy a 160GB hard drive, you will also have 160GB capacity, but will only pay $ 66, and a correct decision will bring more economic efficiency, sometimes a little less money to not save!
Choose any manufacturer? On the market today there are many different hard drive company, has existed for a long time company in Vietnam market and has built a reputation in the market as Maxtor or Seagate, I recommend you buy the hard drive one of the two firms, the hard drive is Segate HDD longest warranty period: 60 months and of course its price is a little higher, firms remaining warranty their products to 36 month period .
Here is an example:
Seagate Barracuda 160GB Serial ATA II (300MB / s), 7200rpm, 8MB Cache
Manufacturer: Seagate Barracuda | Capacity: 160GB | Connectivity: SATA II | Rotating speed: 7200 rpm / min | Cache: 8MB
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