Dealing with computers, advanced users often faced with the need to change the hard drive or to acquire external one. But how to find the proper type for your needs and computer facilities?
HDD (Hard disk drive) – performs the function of storing all your information on your computer. It is better to take into account the volume you need. Although there is also a double edged sword, because if the volume is too large, it will detriment of speed.
So, not much delving into the history of hard drives remember that today there are two main connector interfaces of hard drives connection (varieties differ in data rate).
1) IDE (Integrated Drive Electronics)
This is an older type of connection of hard drives, they are also called ATA – devices. Characterized by a lower data rate on its advanced brother (SATA).
2) SATA (Serial ATA)
This interface is most common today. There are varieties of SATA by bandwidth. After defining the connection type (ATA or SATA) you can move on to the next step, to define the optimal volume and HDD speed.
When selecting HDD is important to take into account parameters such as the spindle speed and the amount of cache memory.
Rotation speed (RPM) determines the rate of data reading from the disk. It is also necessary to pay attention to the amount of HDD cache memory – the more the amount of cache memory, the faster the speed of processing of small files. The most important for those who often work with a large number of small files sizes. To date, the most relevant in terms of price / performance is the volume of 1-1.5 TB hard drives.
Many argue which manufacturer is better, but in fact, today there are only two of them – a Seagate and WD. Someone prefers the first and someone, on the contrary, the second manufacturer. But more important are the characteristics of the hard drive.
In addition to standard HDD, there are SSD.
SSD drives consist of a controller and memory chips and contain no moving parts. It is, by the way, one of the most important advantages of SSD over HDD. Exist two types of SSD drives – SSD drive using flash memory and RAM memory. Speaking in a nutshell the SSD drives using RAM memory are the fastest and most expensive storage devices in the world.
The advantages of SSD:
- No moving mechanical parts, SSD is not “crumble” as the HDD.
- SSD are more compact and are generally in accordance with the form factor of 2.5. While desktop HDD is 3.5.
- No noise – any HDD at high load on begins to show signs of life in the form of noise and crackle.
- SSD are more resistant to mechanical stress and have a wide operating temperature range, including very high, in which the HDD just can not get to work.
This is the biggest drawback of SSD. SSD drives have a limited number of write and rewrite, no more than 100000 times.
Most of SSD users are familiar with this shortcoming, so they use a hybrid bunch of SSD + HDD. The HDD is mainly used to overwrite, while SSD is used to speed up boot and run Windows and all programs installed on the drive.
The price of SSD drives is much higher than conventional HDD. When this value to SSD itself formed depending on the number of gigabytes. Every year the price of the 1 GB SSD drive falls, and with it, the price falls significantly to the HDD.
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