What is a SCSI adapter? And what is the connection between him and the SCSI hard drive?

I don't want to explain it to you at length.

To put it simply. The SCSI adapter is used to connect SCSI equipment. It is an interface card, which was plugged into the PCI interface in the early days, and now uses PCI-E or PCI-X, which is generally used in servers or workstations and home PCs

Seldom use SCSI interface, SCSI hard disk is the so-called SCSI equipment, if the computer wants to use SCSI hard disk machine must have SCSI interface, SCSI interface is provided by SCSI adapter, now most servers or workstation motherboards are integrated SCSI adapter, if not, you can add SCSI adapter.

SCSI also has a lot of equipment, high-end scanners, and a lot of optical drives.

You should be talking about SCSI card, he is a PCI device, we don't have a SCSI hard disk interface on our general PC, his interface is different from our IDE hard disk and SATA hard disk, only some servers have it, so some PCs want to use SCSI hard disk to transfer through SCSI card, such as the server of the Internet café, etc., understand?

A hard disk is a hard disk that uses SCSI as an interface.

2.with sata hard drives.

The differences are as follows: 1. The main body is different SCSI hard disk: use the SCSI interface.

defines how to transfer 20 M/s of data per second on an 8-bit SCSI bus and 40M/s on a 16-bit WideSCSI bus.

Hard disk: Serial hard disk is a hard disk interface jointly proposed by Intel, IBM, Maxtor and Seagate.

New norms. 4.Features of different SCSI hard disks: must be through the SCSI interface to use, some server motherboards integrated SCSI interface, some press a special SCSI interface card, a Xiangli SCSI interface card can be connected to 7 SCSI equipment.

Hard Disk: The storage node is made up of memory.

The MCI and SATA hard disk controllers are responsible for generating, encapsulating, or decapsulating message packets in the message frame format, and extracting and parsing the operation commands that access the storage nodes according to the received message packets.

6.The advantages are different SCSI hard disks: the interface speed is fast, and because it is mainly used for servers, the performance of the hard disk itself is relatively high, the hard disk is rotten and destroyed quickly, the cache capacity is large, the CPU occupancy is low, the scalability is far better than the IDE hard disk, and it supports hot swapping.

Hard disk: It can effectively filter out noise from normal signals, and good noise filtering ability makes SATA only need to use low voltage operation.

Comparison of the differences between IDE, SCSI, SATA hard disk interfaces:

1. The working mode of the IDE requires the full participation of the CPU, and the CPU can not perform other operations when reading and writing data, which will naturally lead to a great slowdown in the system response in the multi-tasking operating system of Windows95 NT. The SCSI interface controls the data read and write operations through an independent high-speed SCSI card, so the CPU does not have to waste time waiting, which can obviously improve the overall performance of the system. However, the current IDE interface has also made great improvements to improve this problem, and can use DMA mode instead of PIO mode to read and write, and the exchange of data is responsible for DMA channels, which can greatly reduce the CPU occupancy.

2. The expandability of SCSI is greater than that of IDE, generally each IDE system can have 2 IDE channels, a total of 4 IDE devices, and SCSI interface can be connected to 7 15 devices, which is much more than IDE, and the connected cables are much longer than IDE.

3. Although the SCSI equipment is higher, compared with the IDE, the performance of SCSI is more stable, durable, and reliable.

Regarding the meaning of SCSI interface, the computer professional terms are explained.

SCSI is an interface between host and peripherals, supporting a wide range of devices, including disk drives, tape drives, optical drives, scanners, and more. It operates the data by a SCSI controller, which is equivalent to a small CPU with its own command set and cache.