IBM TotalStorage FAStT EXP700, Инструкция по установке, использованию и обслуживанию

Страница: 43 / 158

The ESM LED positions are changed slightly in the EXP710, as shown in Figure 8.
v
SFP module input/output ports: Each ESM has two SFP module connector
ports for connecting your storage expansion enclosure to the controller or
connecting two or more storage expansion enclosures together. Install an SFP
module into the input and output ports. Fibre channel cables are used to connect
the storage expansion enclosure to the controller or to additional storage
expansion enclosures.
v
ESM latch: The ESM latch secures the ESM to the storage expansion enclosure.
v ESM levers: The ESM latch must be unlocked before you can use the ESM
levers to remove the ESM from the storage expansion enclosure. When you are
installing the ESM into the bay, use the ESM levers to guide the unit into the
ESM bay.
v
ESMs: The ESMs contain the storage expansion enclosure controls, switches,
and LEDs. Each ESM has two SFP module ports for connecting the storage
expansion enclosure to the controller.
v Fault LED: The amber ESM fault LED is lit when an ESM failure occurs.
v Input/output bypass LEDs: These amber LEDs are lit when a faulty SFP
module or fiber-optic cable is installed. Both ports on the ESM are bypassed and
the LEDs are lit in the event of an ESM fault. In this case, the ESM fault error
LED is also lit. This LED is also lit if an SFP module is installed and not
connected to another device.
v
Power LED: The green power LED is lit when there is power to the ESM.
v Over-temperature LED: The ESM amber LED is lit if the storage expansion
enclosure overheats.
v
Enclosure ID switches: Two enclosure ID switches (x1 and x10) are located
between the power supplies at the rear of the storage expansion enclosure.
These switches are used to identify the storage expansion enclosure on a fibre
channel loop and to assign physical addresses to the drives. The enclosure ID
switch settings for each digit range from 0 through 7.
Attention: When connecting storage expansion enclosures to storage servers,
it is recommended that you use only the ones digit (x1) setting to set unique
server IDs or enclosure IDs. For more information, see “Enclosure ID settings” on
page 30.
v 1 Gb/s 2 Gb/s switch: Use the 1 Gb/s 2 Gb/s switch located on the back of the
storage expansion enclosure to enable drive operation. The default setting is 2
Gb/s. Your switch setting will depend on your system configuration.
Output bypass LED
Over-temperature LED
Fault LED
Power LED
Input bypass LED
e
xp70004c
Figure 8. ESM LEDs on the DS4000 EXP710
Chapter 1. Introduction
11