IBM 5147-024 Manual page 29

v A mode 2 connection of one ESLL or ESLS storage enclosure by using a YO12 cables to two
independent SAS adapters.
v A mode 2 connection of one ESLS storage enclosure by using X12 cables to two SAS adapter pairs.
v A mode 4 connection of one ESLL or ESLS storage enclosure by using X12 cables to four
independent SAS adapters.
6. Locate the connection for each adapter for which you are using an external SAS cable to connect the
enclosure. Adapter cables attach to ports at the rear of the systems in which the adapters are
installed. To identify the SAS port location for the system in your configuration, see "Connector
locations" on page 30 and select the appropriate model.
7. Select from the following options:
v If the server or expansion unit that you are attaching your 5147-024, ESLL, or ESLS storage
enclosure to is powered off, continue with step 12.
v If the system is powered on, you must do one of the following actions, depending on the
supported functions of your operating system:
– Unconfigure the adapters to which you are connecting the enclosure.
– Power off the adapters to which you are connecting the enclosure.
– Power off the logical partitions or systems that own the adapters to which you are connecting
the enclosure.
To do one of these required actions, continue with step 8.
8. Do the following conditions apply to your situation?
v Your system model does not support slot power control.
v Your adapters are not in an I/O enclosure that supports slot power control.
v You are unable to tolerate a temporary loss of access to other disk devices that might exist on the
same adapters.
– Yes: Power off the system or the logical partitions that own the adapters by completing the
steps in "Stopping a system or logical partition" on page 25. Then, continue with step 12.
– No: Continue with step 9.
9. Select from the following options:
v If you can unconfigure the SAS adapters, go to step 10.
v If you cannot unconfigure the SAS adapters, you need to power off the SAS adapters. Go to step
11.
10. To unconfigure the SAS adapters, complete these steps:
a. Unconfigure the SAS adapters.
b. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
c. Connect the SAS cables from the enclosure to the SAS adapters.
d. Reconfigure the SAS adapters.
e. Continue with step 12.
11. To power off the SAS adapters, complete these steps:
a. Power off the SAS adapters.
b. Ensure that you have the electrostatic discharge (ESD) wrist strap attached. If not, attach it now.
c. Connect the SAS cables from the enclosure to the SAS adapters.
d. Power on the SAS adapters.
e. Configure the SAS adapters and devices.
f. Continue with step 12.
12. Choose one of the following options to cable the SAS adapter:
Note: The configuration figures show the use of SAS adapters to represent the external server or
expansion unit connections. The adapter can represent one of the following connection types:
Installing the Model 024, ESLL, or ESLS storage enclosure
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