IBM EXN1000, Руководство по аппаратуре и обслуживанию, Страница: 39 / 94

IBM sets the disk shelf IDs at the factory on configured systems, using an ID
switch on the back panel. If you order additional EXN1000 expansion units,
you must set the disk shelf ID and apply the correct labels provided with the
EXN1000.
Note: If you enter a shelf ID that is not from 1 through 7, the drive addresses
default to those of a shelf with the ID switch set to 7 even though the
Shelf ID indicator in the front operation panel displays a dash (-).
The example in the following illustration shows an EXN1000 expansion unit
with the disk shelf ID set to 2.
Drive addressing
In addition to identifying the disk shelf ID and the direction of the drive bays,
the ID label on the right side of the EXN1000 expansion unit includes the
drive address. The drive address identifies the disks in the EXN1000
expansion unit. The last sheet of the quick reference cards that come with
your EXN1000 expansion unit shows the seven disk shelf IDs and their
corresponding drive addresses.
2
Shelf ID
Mute button
Out port
In port activity LED
In port
Out port activity LED
Ready LED
Fault LED
2
Shelf ID - close-up view
Figure 2. EXN1000 shelf ID
Chapter 1. Preparing for the installation
9