Sun Microsystems SPARCstation 20 Service Manual page 145

Note – The disk drive position determines the assigned SCSI address. When
installed, the bottom disk drive is assigned SCSI address 3 and the top disk drive is
assigned SCSI address 1.
Note – No jumper settings are required for the hard disk drives.
1. Position the hard disk drive as follows (
a. Release the handle latch near the rear of the drive and lift the handle to the
vertical position.
b. While grasping the drive handle with one hand, use the other hand to hold the
drive steady; carefully lower the drive into the chassis.
Note – Ensure that the drive is properly seated in the mounting slots of the drive
bracket and that the SCSI connector on the hard drive is pointed toward the SCSI
backplane.
c. Push the drive handle down away from the connector until the handle locks
into the latch.
Note – When lowered, the drive handle acts as a mechanism to engage the drive
connector with the SCSI backplane socket.
Note – Do not force the drive handle. If the drive handle does not move easily into
the latched position, remove the drive and repeat Steps 3 and 4. If a hard disk drive
is not installed in the top position, SCSI address 1 can be used by an external
peripheral connected to the SCSI bus. However, if a hard disk drive is installed at
the top position, the top position disk drive assumes SCSI address 1, and the
external peripheral must either be re-jumpered to a new SCSI address or
disconnected from the SCSI bus.
2. Remove the wrist strap and replace the cover.
See Chapter 7.
3. Power on the system.
See "Turning On the Power" on page 47.
):
FIGURE 9-4
Chapter 9 Storage Devices 121