IBM MTM 2145-12F, Hardware Installation Manual

Page: 178 / 214

Before you begin
When you power off an expansion enclosure, the drives in that enclosure are no
longer available to the control enclosure. The SAS chain also breaks. Any
expansion enclosures that are beyond the enclosure that is powered down are also
disconnected from the control enclosure.
Before you power off an enclosure, use the management GUI to show the volumes
that depend on that enclosure. In the system view, select the expansion enclosure
to be powered off. Then, select Dependent Volumes. If no configuration changes
are made, other volumes remain available to the system.
Procedure
1. Stop all I/O to the system from hosts that access the expansion enclosure.
2.
Unmount any associated file systems.
3. Wait 5 minutes for all write data to be flushed to the drives.
4. Unplug both of the power cords from the rear of the expansion enclosure to
remove all power from the enclosure.
SAN Volume Controller 2145-92F expansion enclosure LEDs and
indicators
The 2145-92F expansion enclosure has several sets of LEDs that provide
information about the overall status of the enclosure, power, drives, fans, canisters,
and SAS connections.
A 2145-92F expansion enclosure has sets of LEDs on the front and rear of the
enclosure. Inside of the expansion enclosure, LEDs also indicate the status of the
drives and each secondary expander module.
Note: All of the information about the 2145-92F expansion enclosure is also
applicable to the 2147-92F expansion enclosure.
LEDs on the front of the expansion enclosure
As Figure 137 on page 145 shows, the front of the 2145-92F expansion enclosure
contains LEDs for the display panel (
▌1▐
) and for each of the power supply units
(
▌3▐
).
144
SAN Volume Controller: Model 2145-SV1 Hardware Installation Guide