IBM J15, Manual

Page: 70 / 142

• For IBM Cloud Object Storage System
™
, the blue pull tab must be below the cable ( 1 in Figure 40 on
page 42).
Figure 40. SAS cable connector orientation
• For 5U92 disk enclosures, the blue pull tab must be above the connector ( 2 in Figure 40 on page 42).
• Insert the connector gently until it clicks into place. If you feel resistance, the connector is probably
oriented the wrong way. Do not force it.
• When inserted correctly, the connector can be removed only by pulling the tab.
Be aware of the following guidelines when you attach the cables to the SAS ports.
• No cable can be connected between the canisters on a disk enclosures.
• Ensure that cables are installed in an orderly way to reduce the risk of cable damage when replaceable
units are removed or inserted.
• SAS cables must be routed through the cable management arms to reduce the risk of disconnecting the
nodes from their storage arrays. This step also helps to protect the SAS cables from getting damaged if
you slide the node or enclosure out of the rack while they are attached. Arrange your cables to provide
access to the following components:
– Ethernet ports, including the technician port. The technician port is used for initial setup of the
system by directly attaching to a personal computer. It can also be used to complete service actions
for the system.
– USB ports. USB ports can be used to initialize the system or to perform service-related tasks by using
a USB flash drive that contains executable files for initializing the system.
– The nodes and the enclosures themselves. Access is required to the hardware for servicing and for
safely removing and replacing components by using two or more people.
Powering on the 5U92 disk enclosure
Use the following procedure to provide power to the 5U92 disk enclosure as part of the initial installation
process or after a service procedure.
Before you begin
Important: Before you connect the power cables to the rear of the enclosure, always check that the disk
enclosure is secured in the rack. If needed, tighten the thumbscrews on the front of the enclosure ( 2 in
Figure 41 on page 43) to ensure that the enclosure drawer does not roll open.
About this task
The 5U92 disk enclosure has two power supply units (PSUs) that are accessible from the front of the
enclosure ( 4 in Figure 41 on page 43). As the figure also shows, the PSUs are covered by the 1U fascia
( 5 ).
42 IBM Cloud Object Storage System
™
Version 3.15.6: J15 Appliance Manual