IBM INTELLISTATION E PRO 6204, User Manual

Page: 85 / 162

Chapter 5. Installing options
69
Power and signal cables for internal drives: Your computer uses cables to
connect IDE and SCSI devices to the power supply and to the system board. The
following cables are provided:
• Four-wire power cables connect the drives to the power supply. At the end of
these cables are plastic connectors that attach to different drives; these
connectors vary in size. Also, certain power cables attach to the system board.
• Flat signal cables, also called ribbon cables, connect IDE, SCSI, and diskette
drives to the system board. Two or three sizes of ribbon cables come with your
computer.
— The wider IDE signal cable has two or three connectors.
– If the cable has three connectors, one of these connectors is attached to
the drive, one is a spare, and the third attaches to the primary or
secondary IDE connector on the system board.
– If the cable has two connectors, one of these connectors is attached to
the hard disk drive, and the other attaches to the primary or secondary
IDE connector on the system board.
Note: The CD-ROM drive is attached an ATA 66 signal cable. ATA 66 signal
cables are color-coded. The blue connector attaches to the system
board. The black connector attaches to the primary device. The gray
middle connector attaches to the secondary device. If you are
installing a hard disk drive, you must change the switch or jumper
setting on the CD-ROM drive to secondary and change the connector
used for the CD-ROM drive to the gray middle connector.
— The narrower signal cable has two connectors, one to attach to the diskette
drive, and the other to attach to the connector (FDD1) on the system board.
— If your computer comes with a SCSI adapter and SCSI hard disk drive, the
following cables can be used to attach SCSI devices to the SCSI host
adapter:
– An Ultra160 twisted ribbon cable connects the internal Ultra160 SCSI
hard disk drive to the SCSI connector on the SCSI adapter. This cable
has five additional connectors for attaching more internal SCSI devices.
– A round SCSI cable connects external SCSI devices to the SCSI adapter
so that you can add external SCSI devices. For more information about
connecting SCSI devices, see the SCSI documentation on the
Software
Selections CD that comes with your computer.
To locate connectors on the system board, see “System board internal cable
connectors” on page 40.
Review the following information before connecting power and signal cables to
internal drives:
• The drives that are preinstalled in your computer come with power and signal
cables attached. If you replace any drives, remember which cable is attached to
which drive.
• When you install a drive, ensure that the drive connector at the end of the signal
cable is connected to the drive and that the drive connector at the other end is
connected to the system board. This reduces electronic noise from the computer.
• If two IDE devices are used on a single cable, one must be designated as the
primary device and the other as the secondary device; otherwise, the computer
might not recognize some of the IDE devices. The primary and secondary
designation is determined by switch or jumper settings on each IDE device.
• If two IDE devices are on a single cable, and only one is a hard disk drive, the
hard disk drive must be set as a primary device.