Upgrading A Single-Controller To A Dual-Controller When There Is No Attached Exp3500 Enclosure; Upgrading A Single-Controller To A Dual-Controller When There Is One Or More Exp3500 Enclosures Attached To The Storage Subsystem; Connecting Secondary Interface Cables - IBM DS3500 Installation, User's, And Maintenance Manual

i. Wait until the storage subsystem status is Optimal in the Storage Manager
software before proceeding to step 10.
j. Add the drives to the storage enclosure. Make sure that you wait for at
least 30 seconds for the Storage Manager software to recognize each newly
added drive before you install another drive.
Upgrading a single-controller to a dual-controller when there
is no attached EXP3500 enclosure
If you are upgrading a single-controller DS3500 storage subsystem to a
dual-controller DS3500 storage subsystem and there are no EXP3500 storage
enclosures attached to the DS3500 storage subsystem, see "Installing a controller"
on page 107.
Upgrading a single-controller to a dual-controller when there
is one or more EXP3500 enclosures attached to the storage
subsystem
Before you upgrade the DS3500 storage subsystem from a single-controller to a
dual-controller, ensure that you purchase:
v a second environmental services module (ESM) for each EXP3500 storage
enclosure that is attached to the DS3500 storage subsystem. You will install the
second ESM during this procedure.
v the SAS cables that are required to create a redundant drive enclosure path.
To upgrade a single-controller DS3500 storage subsystem to a dual-controller
DS3500 storage subsystem when there are EXP3500 storage enclosures attached to
the DS3500, complete the following steps:
1. Turn off the DS3500 storage subsystem and all attached EXP3500 storage
enclosures.
2. Install a second controller in the DS3500 storage subsystem by using the
instructions in "Installing a controller" on page 107.
3. Install a second ESM in each EXP3500 that is connected to the DS3500 storage
subsystem:
a. Read the safety information on page "Safety" on page ix and "Best practices
guidelines" on page 8.
b. Remove the ESM filler panel from the rightmost ESM bay of the EXP3500.
On the left side of the ESM filler panel, press the orange release tab to the
right just enough to release the handle (no more than 6 mm [0.25 in.]) as
you turn the handle upward. Using the handle, gently slide the ESM filler
panel out of the EXP3500. Save the ESM filler panel for future use.
c. Hold the new ESM so that the handle is fully extended.
d. Gently slide the ESM into the bay until it stops. Turn the handle downward
into the closed position until it clicks.
4. For dual-controller models, connect SAS cables to create a redundant
drive-channel path from the DS3500 controllers to the EXP3500 ESMs using the
information provided in "DS3500 storage subsystem drive cabling topologies"
on page 50,

Connecting secondary interface cables

This section applies to direct (out-of-band) management configurations only. If
your configuration uses host-agent (in-band) management, skip this section.
Chapter 3. Cabling the storage subsystem and storage enclosure
55