Scsi Cable Restriction; Power Cabling; Turning The Expansion Unit On And Off; Turning On The Expansion Unit - IBM Netfinity EXP300 Installation And User Manual

Turning the expansion unit on and off

Turning on the expansion unit

2. Attach one external SCSI cable from the controller in the server to either
SCSI-bus connector.
• To configure the expansion unit as a cluster of 13 drives on a single SCSI bus
when using IBM ServeRAID controllers:
Note: When clustering with IBM ServeRAID adapters, you must configure all
13 disk drives on a single SCSI bus. The drive bay with SCSI ID=6 is
automatically disabled to avoid an ID conflict with one of the ServeRaid
controllers.
1. Verify that internal option switch 3 is set to Off. See "Setting the interface
options and ID settings" on page 11 for more information.
2. Attach one external SCSI cable from the controller in server 1 to the SCSI-
bus 1 connector.
3. Verify that the drive bay with SCSI ID=6 contains a filler panel.
4. Verify that one of the ServeRAID controllers is set to SCSI ID=6.
5. Attach a second external SCSI cable from the controller in server 2 to the
SCSI-bus 2 connector.

SCSI cable restriction

The SCSI controller inside your server must have a dedicated SCSI channel for the
expansion unit. If an external channel is being used for the expansion unit, its
corresponding internal channel must not be used for other devices.

Power cabling

The expansion unit uses two or four power cords, depending on your country. You
can connect the power cords to a primary power unit inside the rack, such as a
properly grounded ac distribution unit or uninterruptible power supply (UPS), or to
an external source, such as a properly grounded electrical outlet.
Attach the power supply power cords as follows:
1. Connect the power cord to the power supply.
2. Plug the power supply cord into a properly grounded electrical outlet.
3. Go to "Turning the expansion unit on and off" below for information about the
initial startup of the expansion unit.
This section contains instructions for turning the expansion unit on and off under
normal and emergency circumstances.
If you are turning on the expansion unit after an emergency shutdown or power
outage, refer to "Turning on the expansion unit after an emergency" on page 23.
Use this procedure to turn on the power for the initial startup of the expansion unit.
1. Verify that:
a. All cables are properly attached.
b. Both power cords are plugged into the back of the expansion unit and into
properly grounded electrical outlets.
Chapter 2. Installing the expansion unit
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