Understanding SCSI Hard drives:
Every time the SCSI disk is released with a new specification, the SCSI drive then supports the new specification, making the SCSI hard drive a leader in SCSI peripherals. Since the development of hard disk technology has been quite mature, so the SCSI hard disk on the interface, always able to keep up with the times, and, moreover, the hard disk is a very important computer equipment, and the lack of him. In fact, all of the hard drives are pretty much the same, but because of the different SCSI specifications, there are some differences in appearance.
SCSI hard drives have always been considered expensive and inaccessible storage devices, not only at a higher price than the IDE hard disk, but also have to choose a different SCSI interface card. Therefore, in such conditions, general computer users tend to use the IDE interface of the hard disk. Although the IDE hard disk has the advantage of low price, but always the enemy is not the speed of the SCSI hard drive, coupled with the SCSI interface for the "multitasking" the best tool, many of the pursuit of stability, speed of the player or the love with the SCSI hard drive.
Hard drives with different SCSI specifications:
With 68-pins Wide SCSI connectors, you can transfer data using the 16-bit channel width.
With 60-pins narrow SCSI connectors, data can only be transmitted in a 8-bit channel width.
Jimper (jumper) settings, mainly used to adjust the ID of the hard drive, terminal resistor switches and so on.
SCSI hard drives are very expensive computer peripherals and you must be very careful when handling them. Due to the current high speed of SCSI hard drives (about 7200rpm~10,000rpm), it is necessary to have a good thermal environment, either outside or in a built-in way to install the hard drive.
To install the hard drive in a built-in way:
Most of the hard drives bought back from the market are built-in hard drives, and only some vendors return the higher-level SCSI hard drives to the external box for sale, making it an off-the-shelf external hard drive. If you feel that your computer chassis has good heat dissipation and free space, you can leave the money in the external box and attach the SCSI hard drive directly to the computer chassis.
Necessary tools for installation:
To install the hard drive system into the chassis, you need some tools to help you at least prepare the following two:
1, Cross screwdriver: Hard disk, SCSI interface cards need to use screws to fix the chassis, at this time must use the cross screwdriver to complete these tasks.
2, Nose pliers: You have to use the nose-nosed pliers to remove, insert the jumper on the hard drive to set the hard drive ID, terminal resistor switch and so on.
Prepare all kits:
When installing SCSI hard drives in a built-in manner, prepare the following sets of accessories:
1, SCSI hard disk: This of course is absolutely indispensable protagonist.
2, SCSI interface card: Unless your motherboard has a built-in SCSI interface, you must prepare a SCSI interface card, and the SCSI interface card and hard disk is also very important to match, please follow the SCSI specifications of the hard disk to use. If you use the Fast SCSI interface card to match the Ultra-wide SCSI hard drive, although it is not a problem to use (you can use the conversion head), the speed and channel width will reduce the long fast SCSI standard.
3, SCSI line: SCSI built-in line is divided into 50-pin single-ended, 68-pin single-ended, 68-pin lvd three kinds, please identify your SCSI hard drive must be with which line.
4, Screws: used to secure the hard disk and SCSI interface card, the use of the two specifications may not be the same Oh!
Installation steps:
Before installing a SCSI hard drive, you should understand the entire process:
HDD jumper set → fixed interface card and hard drive → To line up the hard drive and interface card → Connect the hard disk power
Then we can start installing the SCSI hard drive on the chassis!
1. Adjust SCSI hard disk jumper (jumper): Jumper on hard disk can be used to set SCSI ID, terminal resistor, Parity check and so on.
2. Plug the SCSI interface card on the motherboard: Plug the SCSI interface card into the correct slot on the motherboard and confirm that it is inserted correctly; then use the screwdriver and screws to secure the interface card.
3, fixed hard drive: the hard disk fixed on the chassis cage.
4, connecting the line: With the line to connect the SCSI interface card and hard disk, 68-pins Wide SCSI for special trapezoidal connectors, so there is no reverse connection on the trouble.
If you are installing a narrow (50-pin) hard drive, please note that the red line of 50-pin lines should be aligned to the Pin-1 of the hard disk or interface card.
5, plug the cage back into the chassis and connect the power supply: Determine whether the hard drive in the cage has been installed, and then plug in the hard drive power cord.
So far, hardware installation is generally no problem, please check again SCSI interface card, line, power cord is connected correctly; If everything is confirmed, you can turn on the host power and see if the SCSI BIOS on the screen shows the model of the SCSI hard drive. After startup, a SCSI BIOS screen appears and a SCSI hard drive is found to indicate that the hardware is properly installed!