IBM 847651U Handbook - Page 139
Types of cables, A flat SCSI
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Installing or removing internal drives Types of cables Your server uses cables to connect IDE and SCSI drives to the power supply, riser card, and system board. The diskette drive is also powered through a cable attached to the riser card. Each cable connector is designed to fit a corresponding drive connector. The following cables are provided: Four-wire power cables connect most drives to the power supply. At the ends of these cables are plastic connectors that attach to different drives; these connectors vary in size. Also, some power cables attach to the riser card. Flat signal cables, sometimes called ribbon cables, connect IDE drives to the riser card. There are two sizes of signal cables that come with your server. - The wider signal cable attaches to the primary IDE connector on the back of the riser card. - The narrower signal cable attaches to the diskette drive and to the diskette drive connector on the back of the riser card. A flat SCSI signal cable for connecting devices to the SCSI adapter, if a SCSI adapter comes with your server. If your server model comes with an UltraSCSI adapter, it has a ribbon cable that is connected to the internal SCSI hard disk drive. One end of this cable is connected to the 68-pin, internal SCSI connector on the SCSI adapter. The other end of the SCSI cable has a terminator. This cable provides four connectors for attaching other internal SCSI devices. For more information about SCSI devices, see "SCSI drives (if your server model comes with a SCSI adapter)" on page 110. Note: To locate connectors on the system board, see "System Board Illustration" on page 253. Chapter 4. Installing options 105
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