Working With Gbics; Working With Hot-Swap Cooling Fans - IBM TotalStorage 300 Service Manual

10. Reattach the GBICs and FC cables to their original locations.
11. Check the Bypass LEDs at both ends of the reattached cables. If the Bypass
12. Check the Power and Fault indicator lights on the new ESM board:
13. Refer to your storage-management software for instructions on enabling the

Working with GBICs

The storage unit has four gigabit interface card (GBIC) ports (two on each ESM
board). Use the GBIC ports to attach FC cables to the storage unit.

Working with hot-swap cooling fans

Attention: Do not run the storage unit without adequate ventilation and cooling,
because it might cause damage to the internal components and circuitry.
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IBM NAS 300 Service Guide
1. Check the software documentation provided with your system for instructions
on ESM board failure-recovery procedures. Follow the steps provided in the
software documentation before continuing to step 2.
2. Label each cable to ensure that all cables are properly reconnected to the new
ESM board.
3. Label the GBICs when you remove them. You must install the GBICs in the
same positions on the new ESM board.
4. Remove the GBICs and FC cables from the failed ESM board.
Note: Be careful not to bend the FC cables at a sharp angle or pinch them
with objects. This can decrease the performance or cause data loss.
5. To remove the failed ESM board (the Fault indicator light is lit), push down on
the latch. The levers will pop out of the locked position.
6. Grasp the pull-rings and pull out on the levers, then remove the ESM board.
7. Set the tray numbers on the new ESM board to match the tray numbers on the
failed ESM board.
8. Install the new ESM board by sliding it into the empty slot. Be sure the levers
are pulled straight out as you slide the ESM board into the storage unit.
9. Close the levers until the pull-ring latch locks in place. Make sure that the
levers lock into place.
LEDs are on, reattach the cables and GBICs.
v If the Power indicator is off, the ESM board might not be inserted correctly.
v If the Fault indicator is lit, the Power indicator does not light, or any other
Fault indicator is lit, refer to the User's Reference.
ESM board.