Chapter 3
Installing the enclosures
23
The preceding diagram shows a dual-controller enclosure cabled to either the LFF Disk Enclosure or the SFF Disk
Enclosure featuring dual-expansion modules.
Controller module 1A is connected to the In port of expansion module 2A. The Out port of expansion module 2A
connects to the In port of expansion module 3A—and so on—with a chain of connections cascading down (blue).
Controller module 1B is connected to the In port of expansion module 2B. The Out port of expansion module 2B
connects to the In port of expansion module 3B—and so on—with a chain of connections cascading down (green).
Maximum enclosure configurations are listed in
"Cable requirements for MSA 1060/2060/2062 disk enclosures" on
within the Important bullets.
Verify enclosure connections
The
"Connecting controller and disk enclosures" on page
section describes cabling of optional disk enclosures to a
controller enclosure to add storage. Ensure proper routing and securely seated connections for the SAS cabling between
the controller modules and the expansion modules, before proceeding to power connection and powering on steps.
NOTE After the power-on sequence succeeds, the storage system is ready to be connected as described in
the enclosure to data hosts" on page
.
Powering on/powering off
CAUTION Do not operate the enclosure system until the ambient temperature is within the specified operating
range described in
"Environmental requirements" on page
. If disks have been recently installed, make sure they
have had time to adjust to the environmental conditions before they are used with production data for I/O.
Power on the powered-down system by connecting the power cables from the PCMs to the Power Distribution Unit
(PDU), and moving the power switch on each PCM to the on position.
The System Power LED on the front panel should be lit green when the enclosure power is activated.
1. Ensure the power switch on the PCM is in the off position.
2. Connect the power cables.
3. When powering on, make sure to power up the enclosures and associated data host in the following order:
a. Drive enclosures
first
. This ensures that the disks in the drive enclosure have enough time to completely spin up
before being scanned by the controller modules within the controller enclosure. While enclosures power up, their
LEDs blink. After the LEDs stop blinking—if no LEDs on the front and back of the enclosure are amber—the
power on sequence is complete, and no faults have been detected.
b. Controller enclosure
next
. Depending upon the number and type of disks in the system, it may take several
minutes for the system to become ready.
c. Data host
last
(if powered down for maintenance purposes).
TIP When powering off, you will reverse the order of steps used for powering on.
IMPORTANT If main power is lost for any reason, upon restoration of power, the system will restart automatically if
the power switches on the PCMs are in the on position.
See
and related fault conditions for more details.