What is an SCSI Hard Drive?

A SCSI hard disk is a hard disk that uses a SCSI interface. SCSI is an abbreviation of Small Computer System Interface (Small Computer System Interface). It uses a 50-pin interface and is similar in appearance to a normal hard disk interface. Compared with ordinary IDE hard disks, SCSI hard disks have many advantages: fast interface speeds, and because they are mainly used for servers, the performance of the hard disks is also relatively high, the hard disk speed is fast, the cache capacity is large, the CPU usage is low, and the scalability is much better IDE hard disk, and supports hot swap.

scsi hard drive

A SCSI hard disk is a hard disk using a SCSI interface. SCSI is a Small Computer System Interface (

1. SCSI-1983 began research. The main characteristics of the SCSI standard formulated in 1985 are: support for synchronous and asynchronous SCSI devices; support for 7 8-bit SCSI devices; the maximum transmission rate is 5M / s; support for WORM (WRITE ONCE READ MANY )device. SCSI-1 control uses the card ISA bus. Its maximum connection length is 6 meters and the connector is 50 pins, but it is not used because the transmission speed is too slow.

2. The SCSI-2 SCSI-2 standard was developed in 1992. It adds the following new features to the SCSI-1 standard; supports high-density SCSI connectors; supports CD-ROM and scanners; the SCSI bus has

Pass-through SCSI disks provide a way to connect Hyper-V virtual machines to physical storage (as opposed to relying on virtual hard disks). However, it should be noted that the use of pass-through scsi disks has certain limitations.

in

Compared with the hard disk of ordinary PC, the hard disk used on the server has the following four characteristics.

1.Fast speed

Used by the server

The hard disk is divided from the interface. Can be divided into IDE and SATA hard drives and SCSI hard drives (and some support PCMCIA interface,

When we measure the performance of a server hard disk, we should mainly refer to the following indicators:

The main manufacturers of SCSI hard disks are: Seagate, Quantum, IBM and WD (Western Digital). SCSI hard disks are more expensive. SCSI hard disks of the same capacity will be more than 80% more expensive than IDE hard disks. Therefore, SCSI hard disks are mainly used in mid- to high-end servers and high-end workstations.

In order to enable the hard disk to adapt to a large data volume and a long working time, the server generally uses a high-speed, stable, and secure SCSI hard disk.