IBM DS4400 User Manual

IBM TotalStorage DS4400 Fibre Channel Cabling
Instructions

Installing an IBM Small Form-Factor Pluggable (SFP) module and IBM fibre channel cable

The SFP module housing and fibre channel cable have integrated guide keys that prevent you from
inserting these devices incorrectly. You must insert SFP modules into ports with minimal pressure
so that you do not damage either the SFP module or the port. You can insert an SFP module into
an active port without affecting the operational loop performance. You must connect the fibre
channel cable to the SFP module

Attention:

To avoid damage to your fibre-optic cables:

• Do not route the cable along a folding cable-management arm.

• For devices on slide rails, leave enough slack in the cable so that it does not bend to a radius
less than 38 mm (1.5 in.) when extended or become pinched when retracted.

• Route the cable away from places where it can be damaged by other devices in the rack
cabinet.

• Do not use plastic cable ties in place of the provided cable straps.

• Do not overtighten the cable straps or bend the cables to a radius of less than 38 mm (1.5 in.).

• Do not put excess weight on the cable at the connection point. Be sure that the cable is well
supported.

To install an SFP module and fibre channel cable:

1.

Remove the protective caps from the SFP module and from the fibre channel cable. Do not
touch the exposed fibre-optic cable

Wire

Protective

tab

cap

o

90

SFP

module

2. Insert the SFP module into an SFP module port on an IBM DS4400 mini hub.

3. Connect the fibre channel cable to the SFP module.

To remove a fibre channel cable and SFP module:

1. Remove the fibre-optic cable from the SFP module; then, replace the protective caps on the
cable connector.

Attention:

Do not grasp the plastic tab that is part of the SFP module while disconnecting the
fibre-optic cable. Pulling the SFP module plastic tab while disconnecting the fibre-optic cable
might damage the SFP module.

2. For SFPs with

plastic tabs

remove the SFP module. The plastic tab releases the SFP module latch.

3. For SFPs with

wire tabs

the SFP module. The wire tab releases the SFP module latch.

4. Replace the protective cap on the SFP module.

after

you insert the SFP module into the port.

.

Protective

caps

Protective

cap

10

Plastic

o

tab

Fibre Channel
cable

SFP

module

, pull the SFP module plastic tab outward at a 10° angle while you

, pull the SFP module wire tab outward at a 90° angle and remove

®

Part Number 25R0407

Printed in the U.S.A.

Statement 3

CAUTION

:

When laser products (such as CD-ROMs, DVD drives, fibre-optic devices, or transmitters)
are installed, note the following:

• Do not remove the covers. Removing the covers of the laser product could result in
exposure to hazardous laser radiation. There are no serviceable parts inside the
device.

• Use of controls or adjustments or performance of procedures other than those
specified herein might result in hazardous radiation exposure.

DANGER

Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the
following:

Laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.

Class 1 laser statement

Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Appareil A Laser de Classe 1
IEC 825-1:1993 CENELEC EN 60 825

Host mini hubs

Drive mini hubs

Controller A

34

43

2

1

2 G

2 G

2 Gb/s

2 G

1 G

b/s1 G

b/s1 Gb/s

b/s

!

O
U
T

IN

b/s1 G

b/s

b/s

!

!

!

OU

OU

O
UT

T

T

IN

IN

IN

2

1

2 G

2 G

2 Gb/s

2 Gb/s

1 G

b/s1 Gb/s

!

O
UT

IN

1 G

b/s1 Gb/s

b/s

b/s

!

!

!

O

OU

O

UT

UT

T

IN

IN

IN

Mini hub
Out ports

Mini hub
In ports

Controller B

DS4400 Storage Server

Host 1, Host Adapter 1 and 2 Host 4, Host Adapter 1 and 2

Host 1 Host 4

2 Gb/s1 Gb/s

!

OUT

IN

Host 2

2 Gb/s1 Gb/s

2 Gb/s1 Gb/s

2 Gb/s1 Gb/s

!

!

!

OUT

OUT

OUT

IN

IN

IN

Host 3

2 Gb/s1 Gb/s

2 Gb/s1 Gb/s

2 Gb/s1 Gb/s

!

OUT

IN

2 Gb/s1 Gb/s

!

!

!

OUT

OUT

OUT

IN

IN

IN

Host-side fibre channel cabling
Attention:

Install the DS4400 Storage Server and all storage expansion enclosures in the rack

cabinet before cabling the configuration.

1. Connect a host adapter to the Host 1 (top) port on host-side mini hub 1. For redundancy,
connect a second host adapter to the Host 1 (top) port on the host-side mini hub 2.

Note:

To connect devices to each other, follow the procedure on the other side of this

document for installing SFP modules and fibre channel cables.

2. For a second redundant host, connect two host adapters to the Host 2 (bottom) ports on host­side mini hubs 1 and 2.

3. For a third redundant host, connect two host adapters to the Host 3 (bottom) ports on host­side mini hubs 3 and 4.

4. For a fourth redundant host, connect two host adapters to the Host 4 (top) ports on host-side
mini hubs 3 and 4.

Storage expansion enclosure support

The DS4400 Storage Server enables you to mix certain storage expansion enclosure models in
the same storage server configuration. In some cases, to intermix storage expansion enclosure
models you must meet additional requirements such as firmware updates or grouping restrictions.
To intermix fibre channel and SATA drives, you must purchase the FC/SATA Enclosure Intermix
premium feature. The DS4400 suppor ts up a maximum of 224 drives in two redundant drive loop
pairs.

Host 2, Host Adapter 1 and 2 Host 3, Host Adapter 1 and 2

In ports Out ports

Last enclosure

Drive loop A

Group 1

Drive loop B

Drive loop C

First enclosure

Storage server

Out ports
In ports

First enclosure

Drive loop D

Group 2

Last enclosure

Refer to the

and Migration Guide

IBM TotalStorage DS4000 Hard Drive and Storage Expansion Enclosure Installation

for complete information on storage expansion enclosure support and

intermixing requirements for the DS4400 Storage Server.

Drive-side fibre channel cabling

1. Start with the first storage expansion enclosure of Group 1 and connect the In port on the left
ESM board to the Out port on the left ESM board of the second (next) enclosure.

2. Start with the first storage expansion enclosure of Group 1 and connect the In port on the
right ESM board to the Out port on the right ESM board of the second (next) enclosure.

3. If you are cabling more storage expansion enclosures to this group, repeat steps 1 and 2,
starting with the second enclosure.

4. If you are cabling a second group, repeat step 1 to step 3 and reverse the cabling order;
connect from the Out ports on the ESM boards to the In ports on successive storage
expansion enclosures according to the illustration on the left.

5. Connect the Out port of drive-side mini hub 4 (left-most drive side) to the In port on the left
ESM board of the last storage expansion enclosure in Group 1.

6. Connect the In port of drive-side mini hub 3 to the Out port on the right ESM board of the first
storage expansion enclosure in Group 1.

7. If you are cabling a second group, connect the Out port of drive-side mini hub 2 to the In port
on the left ESM board of the first storage expansion enclosure in Group 2; then, connect the
In port of the drive-side mini hub 1 (right-most drive side) to the Out port on the right ESM
board of the last storage expansion enclosure in Group 2.

8. Ensure that each storage expansion enclosure has a unique ID (switch setting) and that the
left and right ESM board switch settings on each storage expansion enclosure are identical.

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