Figure 22. Mode sticker locations at the rear of the enclosure
4. Ensure that all adapters that you need to connect to the 5887 disk drive enclosure are installed in the
system or expansion unit. If the adapters are not installed, complete the adapter installation
procedure for your system or expansion unit before you continue with this task.
5. If the system requires an internal cable to be installed to produce an external SAS port for connection
with the enclosure, confirm that the installation was completed.
Remember: When you install or confirm the use of an external SAS port, record the location of the
external SAS port on the system. Later in this procedure, you are instructed to install the external
SAS cable to this system connector location.
6. Determine the configuration that you use to cable the SAS adapter to the 5887 disk drive enclosure.
The following list shows some of the common connections, but not all possible connection options.
For more configuration options, see Planning for serial-attached SCSI cables (http://www.ibm.com/
support/knowledgecenter/POWER9/p9had/p9had_sascabling.htm).
• A mode 1 connection of one 5887 disk drive enclosure by using a YO cable to a single SAS adapter.
• A mode 1 connection of two 5887 disk drive enclosures by using YO cables to a single SAS adapter.
• A mode 1 connection of one 5887 disk drive enclosure by using YO cables to a SAS adapter pair.
• A mode 1 connection of two 5887 disk drive enclosures by using YO cables to a SAS adapter pair.
• A mode 2 connection of one 5887 disk drive enclosure by using YO cables to two independent SAS
adapters.
• A mode 2 connection of one 5887 disk drive enclosure by using X cables to two SAS adapter pairs.
• A mode 4 connection of one 5887 disk drive enclosure by using X cables to four independent SAS
adapters.
7. 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 and select the appropriate model.
24 Power Systems: Installing the 5887 disk drive enclosure
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