IBM TotalStorage FAStT EXP700, Installation, User'S, And Maintenance Manual

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Gb/s or 2 Gb/s fibre channel interface to the DS4000 storage server drive loop
ports. The DS4000 EXP710 provides a 2 Gb/s fibre channel interface only to the
DS4000 storage server drive loop ports.
Attention: After you remove an ESM, wait 70 seconds before reseating or
replacing the ESM. Failure to do so may cause undesired events.
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. The ESMs provide redundancy when both of
them are configured into redundant fibre channel loops. See your fibre channel
controller documentation to determine if the controller supports this redundancy
function.
Note: The DS4000 EXP700 and EXP710 ESMs are not interchangeable. In
addition, you cannot mix DS4000 EXP700 and DS4000 EXP710 ESMs in
the same storage expansion enclosure. Always verify that you have the
correct FRU P/N before you order replacement ESMs or insert
replacement ESMs in the storage expansion enclosure.
Your storage expansion enclosure ESMs come with locking latches to secure the
ESMs to the storage expansion enclosure bays. The latch must be unlocked
before the ESM can be removed from the storage expansion enclosure.
v
Hot-swap power-supply bays: Your storage expansion enclosure comes with
two hot-swap and redundant power supplies. The power supplies are located in
the hot-swap power-supply bays. Both power supplies must be installed in your
storage expansion enclosure, even if one power supply is not operational.
Front controls and indicators
This section describes the primary controls on the front of the storage expansion
enclosure. The location of these primary controls are shown in Figure 4.
v Drive Activity LED: Each drive CRU has a DriveActivity LED. When flashing,
this green LED indicates drive activity. When lit, this green LED indicates the
drive is properly installed and powered on.
v
Blank tray: Storage expansion enclosures come with blank trays in the unused
drive bays. To begin installing new drives, you must first remove the blank trays
and save them. Each of the 14 bays must always contain either a blank tray or a
drive CRU to ensure proper air flow across the drives and to comply with
regulatory electromagnetic emission limits.
Activity LED
Drive CRU
Tray handle
Latch Fault LED
Power-on LED
General system
error LED
Enclosure
Identity LED
Bezel
Blank tray
e
xp70005
Figure 4. Front controls and indicators
Chapter 1. Introduction
7