IBM J15, Manual

Page: 82 / 142

SEM2 Expander 1 0EA4.official
SEM2 Expander 2 0EA4.official
12. Attach a second SAS cable to HBA and port two on the right-hand HBA.
What to do next
Failure to update the Disk Enclosure FW can cause attached controller from booting correctly and disk
enclosure be properly recognized within the IBM Cloud Object Storage System.
Installing or replacing a secondary expander module
You can replace a faulty secondary expander module in a 5U92 disk enclosure. You may also need to
install a secondary expander module that was temporarily removed to perform other service tasks.
Before you begin
DANGER:
Hazardous voltage present. Voltages present constitute a shock hazard, which can cause severe
injury or death. (L004)
DANGER:
Hazardous energy present. Voltages with hazardous energy might cause heating when shorted
with metal, which might result in splattered metal, burns, or both. (L005)
CAUTION:
• Only an IBM Service Support Representative (SSR) can remove or replace the secondary
expander module from an enclosure (FRU P/N 01LJ112) that is powered on. If the 01LJ112
enclosure is powered on, use caution and avoid contact with the connectors on the main board.
• If the FRU part number of the enclosure is 01LJ607, you can remove or replace the secondary
expander module while the enclosure is powered on.
Important:
• You can replace a secondary expander module without powering off the expansion enclosure. However,
to maintain operating temperature, do not keep the cover off an operational enclosure for more than 15
minutes. The reduction in airflow through the enclosure might cause the enclosure or its components to
shut down to protect from overheating.
• Ensure that the FRU P/N for the replacement secondary expander module is appropriate for the
enclosure in which it is being installed. For more information, see “Replaceable units: 5U92 SAS disk
enclosure ” on page 51.
About this task
As Figure 52 on page 55 shows, the 5U disk enclosure contains two secondary expander modules. In the
figure, A shows the location of secondary expander module 1, B shows secondary expander module 2,
and C shows the front of the enclosure.
The secondary expander modules provide SAS connectivity between the expansion canisters and the
drives. Each drive has 2 SAS ports. SAS port 1 of each drive is connected to expansion canister 1 through
secondary expander module 2. SAS port 2 of each drive is connected to expansion canister 2 through
secondary expander module 1. If secondary expander module 2 is missing or is faulty, the expansion
54 IBM Cloud Object Storage System
™
Version 3.15.6: J15 Appliance Manual