What is the laptop hard drive interface

What are the laptop hard drive interfaces?

Notebook hard disk has two kinds, one kind of ATA interface, commonly known as IDE hard disk, another kind is now more commonly used SATA interface, serial port hard disk, but a few years ago machine also bad judgment is that kind of hard disk, use recognition software to identify a bit to know.

The following is a screenshot of the software (the software will not only provide control of the hard drive, but can also quickly detect the health of the hard drive):

SATA interface:

ATA Interface:

Size: Laptops use 2.5-inch hard disks, while desktops are 3.5 inches, and laptops hard disks are one of the few common parts of laptops, and virtually all laptop hard drives are universal.

Thickness: But the laptop hard disk has a desktop hard drive does not have the parameter, is the thickness, the standard notebook computer hard disk has 9.5,12.5,17.5mm three kinds of thickness. 9.5mm hard disk is for ultra light ultra-thin model design, 12.5mm hard disk is mainly used for thick light soft swap and the entire built-in model, as for 17.5mm hard disk is the previous small size of the product, now basically no models adopted.

Number of RPM: Notebook hard drive is now the fastest 5400 2M cache, support DMA100 (mainstream model only 4200 to 512K cache, support DMA66), but its speed and now desktop slowest 5400 to 512K Cache hard drive compared to the difference is very far, Since laptops have a 2.5-inch platter on their hard disks, the laptop hard drive is now the biggest bottleneck in laptop performance, even if the speed is the same and the line speed of the outer ring is not comparable to that of a 3.5-inch platter desktop hard disk.

Interface type: Laptop hard disk is generally connected with the motherboard in 3 forms: the hard drive pins are connected directly with the socket on the motherboard, connected with a special hard drive cable and the motherboard, or connected with the socket of the adaptor and the motherboard. Either way, the effect is the same, only depends on the manufacturer's design.

Capacity and adoption of technology: As the application is becoming larger, hard disk capacity also has an increasing trend, for notebook computer hard disk, not only requires its capacity, but also requires its small size. To address this paradox, the hard drive of a notebook computer is generally based on magneto-resistive head (MR) technology or extended reluctance Head (MRX) technology, MR heads record data at very high densities, increasing disk capacity, increasing data throughput, and reducing the number of heads and disk space, improving disk reliability and anti-jamming, Vibration performance. It also uses new technologies such as enhanced adaptive battery life Extender, PRML digital channel, new smooth head loading/unloading, etc.