SCSI HPCN| HPDB servo drive I/O signal cables

Hard Disk 
At present, the SCSI interface is commonly used as a variety of devices, such as hard disks, recorders (optical drives), scanners, MOs, and ZIPs, which are usually mainly used as storage media.
This is the earliest peripheral supported by the SCSI interface, on the grounds that the early hard disk capacity is small, slow, and the expansion capacity of the host is insufficient, so SCSI hard disk is almost the only choice for workstations and servers. Although the current IDE hard disk has made significant progress in capacity and speed, it is still far from the SCSI interface, and the efficiency and scalability are still insufficient.
From the appearance, it is not easy to distinguish between SCSI and IDE hard drives, except for the model and merchant instructions, you can confirm from the unfinished slot of the hard drive:
The IDE interface has only 40 pins, and there must be Master and Slave settings on the IDE interface.
The number of pins in the SCSI interface is different, and the SCSI interface must have two sets of settings: IDE and terminal resistor.

Burner
The recorder is also a kind of storage equipment, which belongs to a kind of optical drive, and naturally has all the functions of the optical drive, with the characteristics of easy storage, not affected by magnetism, large storage space, low cost and so on; More importantly, it allows users to write data as a data preparation tool, which is the hottest computer peripheral in the past year or two.
Like hard disks, there are currently two major interfaces of IDE and SCSI to fight, which is not enough According to the reaction of ordinary players, it will be more stable to burn with SCSI interface.
The interface recognition method of the burner is exactly the same as that of the hard disk.

scanner
The function of the scanner is to convert ordinary pictures, manuscripts, and data into graphic files in the computer. Storing images in bits can not only avoid damage to precious photos caused by paper aging, but also create interesting pictures by computer image processing. At present, there are many types of scanners and the price is cheap, and 2000~5000 yuan can have good quality that satisfies you.
The scanner is an external peripheral, and in the early days, only SCSI interfaces were available for purchase, but now there are more parallel ports and USB interfaces, and some models have SCSI and other interfaces at the same time. From the appearance, USB and parallel ports are quite easy to distinguish, while the SCSI interface is relatively inconsistent due to the variety of interfaces, but as long as the ID setting function can determine that this is an SCSI scanner.
MO
MO is another optical storage medium, which originally only used SCSI interface, but now there are IDE interface products. However, the SCSI interface has the advantages of stable reading, external connection, and fast speed, which is relatively common in the market. MO tablets are smaller in size but have a capacity of up to 1.3GB, which is also easy to store and carry like optical discs. More importantly, the function of repeatable data writing was almost an essential tool for backing up data when recorders were not yet popular.
ZIP
ZIP should be very familiar, magazine advertisements often appear in his tracks; His goal was to replace 3.5" disks as the new standard for floppy drives. At present, ZIP has a capacity of 100 and 250MB, which seems to be less attractive than the 680MB of optical discs, but it is a very popular portable storage device due to its low price and the manufacturer's strategy is well used.
ZIP has two categories: internal and external, and has a variety of interfaces such as SCSI, USB, IDE, and parallel ports; It is important to note that the SCSI interface of the external ZIP interface (DB-25) is the same as the parallel port, so you need to pay more attention when installing it.