Working with SCSI Components
This section contains information about SCSI configurations and
cable restrictions.
SCSI Configurations
The IBM Netfinity EXP15 comes with an electronics board that
interfaces between the external SCSI cables and the hot-swap
backplane. There are a total of two 68-pin SCSI very high density
connector interface (VHDCI) connectors. From left to right as seen
from the back, these connectors are: SCSI bus 1 and SCSI bus 2.
(See “Rear Controls, Indicators, and Connectors” on page 5 for the
location of these connectors.) There are several ways to use these
buses.
To configure each bus independently:
1. Attach one external SCSI cable from the controller in the
server to the SCSI bus 1 connector.
2. Attach a second external SCSI cable from the controller in
the server to the SCSI bus 2 connector.
3. Set Switch 1 to the ON (or up) position.
To configure the expansion unit as a single 10-drive SCSI
channel:
1. Attach one external SCSI cable from the controller in the
server to either SCSI bus connector.
2. Set Switch 1 (of 5) in the OFF (or down) position.
To configure the expansion unit as a cluster of 10 drives on a
single channel when using IBM ServeRAID adapters:
1. Attach one external SCSI cable from the controller in the
server to the SCSI bus 1 connector.
2. Attach a second external SCSI cable from the controller in
the server to the SCSI bus 2 connector.
3. Set Switch 1 to the OFF (or down) position.
Note: When clustering with an IBM ServeRAID adapter, you
must configure all ten disk drives as a single SCSI bus.
Chapter 4. Installing and Replacing Devices
47
Summary of Contents for EXP15
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Page 13: ...Safety Information xi...
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Page 124: ...IBM Part Number 24L7940 Printed in U S A September 1998 24L794...