What is the difference between 2 5 and 3 5 hard disk interface, 2 5 inch and 3 5 inch hard disk

Yes, of course.

The pins of the laptop hard disk are actually not much different from the general inch hard disk, almost a smaller version of the ordinary hard disk, but there are 44 pins, two more pairs than the inch hard disk. The extra two pairs of pins are used to connect to the power supply, the laptop hard disk does not have a separate design power supply design, there is no particularly obvious difference between the power supply and the data pins, and of course there is no foolproof design on the ordinary hard disk, so when modifying the laptop hard disk, it is very important to distinguish the positive and negative poles of the power supply, because if the power supply is connected wrong, the hard disk must be reimbursed, maybe you can see a burst of white smoke coming out, so you must be cautious!

Although the interface design of the inch hard disk is not much different from the inch hard disk, the reduced version cannot be directly installed on the desktop computer, so an adapter is also needed, which is the adapter interface.

This adapter is attached with a 5V power cable, which can be directly transferred to the 12V-5V power interface of the desktop computer, but when connecting, it should be noted that there is a pin position and a 5V mark on the adapter interface, and it should be noted that the red line represents 5V and the black represents 5V, and the red line corresponds to the 5V mark on the adapter interface. As for the connection of the data cable, it is more troublesome, the data connection method of the laptop hard disk is different from that of the ordinary hard disk, and the method of the data cable 1 pin close to the power socket is different, and it is necessary to look carefully in actual operation.

Laptop hard drives can be mounted on desktop hosts, but an adapter card is required.

The difference between inches and inches of hard disks: different capacities, different sizes.

1. Different capacities: under the same capacity and the same speed, the reading speed should be slightly faster. The 5400 rpm of the inch hard disk is about the same as the ** of the same capacity of 7200 rpm, but the speed is not as good as the 7200 rpm.

A 7200-rpm hard disk is definitely more expensive than a large disk with the same capacity and speed, and there is also a factor of cache size.

Second, the size is different: inch hard disk is generally used for desktops, because the space is relatively large. Inch hard drives are generally used in notebooks because of the small space in the notebook. One is really big, and the other is really small. The big one is the inch, and the small one is the inch.

The capacity of the hard disk.

The metric also includes the capacity of a single disk of the hard disk. The so-called single-disk capacity refers to the capacity of a single disk of the hard disk, the larger the single-disk capacity, the lower the unit cost, and the shorter the average access time. For users, the capacity of a hard drive is like memory, it is always too little, not too much.

In addition to easier operation, the Windows operating system has also brought about the increasing size and number of files, and some applications are often eating up hundreds of megabytes of hard disk space, and there is a tendency to increase.

The dimensions of a 3-point-5 drive are 147mm (length), 102mm (width), and 26mm (thickness), and the dimensions of a 2point-5 drive are 70mm (width), 100mm (length) or 7mm (thickness).

The speed of the 2-point 5-inch hard disk is 5400 rpm, and the speed of the 3.5-inch hard disk is 7200 rpm. 3-point 5-inch hard drives are generally used for desktops, and the space is relatively large.

Xiangzheng Shiguan information:

Hard disk is one of the main storage media of a computer, consisting of one or more aluminum or glass discs. The disc is covered with a ferromagnetic material.

The interface is the same, but the size is different.

Extended Information: About SATA Hard Drives

1. SATA (Serial ATA) port hard disk, also known as serial port hard disk, is the trend of PC hard disk in the future, and has basically replaced the traditional PATA hard disk. The full name of SATA is Serial Advanced Technology Attachment, Intel, APT, Dell, IBM, Seagate, Maxtor These major manufacturers of the Serial ATA Committee formally established the Serial ATA specification, in 2002, although the Serial ATA related equipment has not yet been officially listed, but the Serial ATA Committee has preemptively established the Serial ATA specification. Serial ATA uses a serial connection method, and the serial ATA bus uses an embedded clock signal to have stronger error correction capabilities, and the biggest difference compared to the past is that it can check the transmission instructions (not just data) and automatically correct if errors are found, which greatly improves the reliability of data transmission.

The serial interface also has the advantage of being simple and hot-swappable.

2. SATA interface needs the support of hardware chips, such as Intel ICH5 (R), VIA VT8237, NVIDIA's MCP RAID and SIS964, if the motherboard south bridge chip can not be directly supported, you need to choose a third-party chip, such as Silicon Image 3112A chip, etc., but this will also produce some hardware performance differences, and the driver is also more complicated.

Yes, the interface is the same as the inch, and the power supply interface is the same, mainly because the shape and size of the hard disk are different.

Please see**, the picture above is, the picture below is.

Serial port hard disk interface, there are a variety of specifications and standards. As far as the SATA interface is concerned, the interface of the laptop is unified with that of the desktop. It can be universal, as long as the hard disk bay can fit the disk. There are three different standards for SATA interfaces:

1. In earlier versions, the interface transfer rate was 150MB s. It is 50% more efficient than the ATA100 interface of IDE;

2. In the mid-term version, the interface transfer rate is 300MB s;

3. In the current version, the interface transmission rate is 600MB s;

4. The high-version interface hard disk should match its corresponding version interface to obtain the highest performance. However, in practical applications, those old motherboards only have version interfaces, and the current hard disks are standard, and there will be a slight loss of hard disk performance when using. The main thing is to affect external data.