IBM 6648 User Guide - Page 75

signal cable is always connected to a drive; also, ensure that the drive

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a second hard disk. ATA 66 signal cables are color-coded. The blue connector attaches to the system board; the black connector attaches to the master device, and the gray middle connector attaches to the slave device. If your computer comes with a CD-ROM drive, it will have an ATA 66 signal cable. However, if you installing a hard disk drive, you must change the switch setting on the CD-ROM drive to secondary and change the connector used for the CD-ROM drive to the gray middle connector. 2. If you are installing a slimline CD-ROM drive in the small form factor desktop model, the IDE cable requires a special connector to attach to the slimline CD-ROM drive. This connector can be attached only to an optional slimline CD-ROM drive. - The narrower signal cable has two connectors for attaching the diskette drive to the diskette-drive connector on the system board. Note: To locate connectors on the system board, see "Identifying parts on the system board" on page 48. The following are some important points to remember when connecting power and signal cables to internal drives: v The drives that are preinstalled in your computer come with power and signal cables attached. If you replace any drives, it is important to remember which cable is attached to which drive. v When you install a drive, ensure that the drive connector at the end of the signal cable is always connected to a drive; also, ensure that the drive connector at the other end is connected to the system board. This reduces electronic noise from the computer. v If two IDE devices are used on a single cable, one must be designated as the primary or master device and the other as the secondary or subordinate device; otherwise, some of the IDE devices might not be recognized by the system. The primary or secondary designation is determined by switch or jumper settings on each IDE device. v 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 the master device. v If you have only one IDE device on a cable, it must be set as master. For help in selecting drives, cables, and other options for your computer, see page 44. Chapter 5. Installing options 61

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a second hard disk. ATA 66 signal cables are color-coded. The blue
connector attaches to the system board; the black connector attaches
to the master device, and the gray middle connector attaches to the
slave device.
If your computer comes with a CD-ROM drive, it will have an ATA
66 signal cable. However, if you installing a hard disk drive, you
must change the switch setting on the CD-ROM drive to secondary
and change the connector used for the CD-ROM drive to the gray
middle connector.
2.
If you are installing a slimline CD-ROM drive in the small form
factor desktop model, the IDE cable requires a special connector to
attach to the slimline CD-ROM drive. This connector can be
attached only to an optional slimline CD-ROM drive.
–
The narrower signal cable has two connectors for attaching the diskette
drive to the diskette-drive connector on the system board.
Note:
To locate connectors on the system board, see “Identifying parts on the
system board” on page 48.
The following are some important points to remember when connecting power
and signal cables to internal drives:
v
The drives that are preinstalled in your computer come with power and
signal cables attached. If you replace any drives, it is important to remember
which cable is attached to which drive.
v
When you install a drive, ensure that the drive connector at the
end
of the
signal cable is always connected to a drive; also, ensure that the drive
connector at the other end is connected to the system board. This reduces
electronic noise from the computer.
v
If two IDE devices are used on a single cable, one must be designated as the
primary or master device and the other as the secondary or subordinate
device; otherwise, some of the IDE devices might not be recognized by the
system. The primary or secondary designation is determined by switch or
jumper settings on each IDE device.
v
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 the master device.
v
If you have only one IDE device on a cable, it must be set as master.
For help in selecting drives, cables, and other options for your computer, see
page 44.
Chapter 5. Installing options
61