IBM DS3950, Руководство пользователя и инструкция по установке

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storage expansion enclosures such as the EXP710 or EXP100. Refer to the DS3950
RFAs for the latest information about drive capacities and drive types that are
supported in the DS3950 configurations with EXP395s.
Attention:
1. After you remove a drive FRU, wait 70 seconds before replacing or reseating
the drive FRU to allow the drive to properly spin down. Failure to do so may
cause undesired events.
2. Never hot-swap a drive FRU when its associated green Activity LED is
flashing. Hot-swap a drive FRU only when its associated amber Fault LED
lights is not flashing or when the drive is inactive and its associated green
Activity LED lights are not flashing.
Note: If the E-DDM you want to remove is not in a failed or bypass state, always
use the DS Storage Manager client program either to place the E-DDM in a
failed state or to place the array that is associated with the E-DDM (or
E-DDMs) in an offline state before you remove it from the enclosure.
Environmental Service Modules (ESMs)
The EXP395 has two hot-swappable and redundant ESM units. The ESMs are
located at the back of the storage expansion enclosure. The left ESM is labeled ESM
A, and the right ESM is labeled ESM B. One ESM will continue to operate if the
other ESM fails.
The ESMs contain the storage expansion enclosure control logic, interface ports,
and LEDs. Each ESM has four SFP module ports that you could use to connect the
storage expansion enclosure to the controller. However, only the two ESM SFP
ports (labeled 1A and 1B) near the center of the storage expansion enclosure are
used. The SFP ports labeled 2A and 2B are reserved for future use.
The EXP395 ESMs support automatic ESM firmware synchronization. This function
allows a new ESM with a different level of ESM firmware to be automatically
synchronized with the ESM firmware version in the existing ESM in the EXP395
chassis. To enable automatic ESM firmware synchronization:
1. Verify that the DS Storage Manager Event Monitor is installed and running.
2.
Verify that the DS3950 storage subsystem that the EXP395 is attached to is
defined in the Enterprise Management window of the DS Storage Manager
client (SMclient).
Although both ESM units (A and B) are identical, they are seated in the EXP395
chassis in opposite orientations. If the ESM cannot fully be inserted in the ESM
bay, flip it 180 degrees and reinsert it.
Connectors, switch, and enclosure ID
The enclosure ID, comprised of a pair of seven-segment numbers, is located on the
back of each ESM next to the ESM indicator lights. The two digits that comprise
the enclosure ID are referred to as x10 and x1 digits. The enclosure ID provides a
unique identifier for each enclosure in the storage subsystem. The storage
management software automatically sets the enclosure ID number. You can only
change the enclosure ID setting through the DS storage management software.
There are no switches on the EXP395 chassis to manually set the enclosure ID.
Both ESM enclosure ID numbers will be identical under normal operating
conditions. For more information regarding the enclosure ID, see “Enclosure ID
settings ” on page 31.
Chapter 1. Introduction
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