IBM EXN1000, Hardware And Service Manual, Page: 46 / 94

Attention: It is recommended that you stop all I/O processes before
hot-adding an EXN1000 to an existing loop. Perform a hot-add only during
off-peak times.
To hot-add an EXN1000 expansion unit to an existing loop, complete the
following steps:
1.
Put on the antistatic ESD strap and grounding leash.
2. Verify that you received the disk shelf ID labels.
3. Install the new EXN1000 expansion unit in the rack, cable and ground the
EXN1000, and connect the power cables to the EXN1000, as described in
the Installation and Setup Instructions you received with your N series
product.
CAUTION:
Do not turn on the power to the EXN1000 expansion unit yet.
After you have completed the installation steps described in the Installation
and Setup Instructions , continue with Step 4.
4.
Verify that all the cables are securely fastened.
CAUTION:
Poorly secured cables cause the N series storage system to panic over an
open loop.
5. If you have not done so, give the EXN1000 expansion unit a unique disk
shelf ID. It is recommended that you choose a number which is one higher
than the previous shelf (or ID 1 if this is the first EXN1000 in the loop).
a. Press the small buttons on the switch on the rear of the EXN1000
expansion unit, using the + button to raise the number and the -
button to lower the number to a valid ID from 1 through 7. Refer to
Figure 2 on page 9 for an illustration.
Note:
Only use disk shelf ID 7 if it is the last ID available. If you
change a disk shelf ID, you must power-cycle the EXN1000
expansion unit for the new ID to take effect. The disk shelf ID
display on the front of the EXN1000 expansion unit blinks until
you power-cycle the EXN1000 expansion unit.
b. Verify that the disk shelf ID is not being used in the loop by entering
the following command at the console:
fcstat device_map adaptername
c. Select the correct matching shelf ID label, reference Figure 1 on page 8,
and attach it to the right flange of the new EXN1000 expansion unit.
CAUTION:
An invalid disk shelf ID causes the N series storage system to panic.
6. Turn on the power to the EXN1000 expansion unit. You must wait 30
seconds for the shelf electronics to finish initializing.
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