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Labeling Cables Connecting cables is an important part of creating a robust storage array. Labeling the
cables identifies system components, drive channels, and loops. System maintenance
is easier when the cables are correctly identified. Label both ends of each cable. You
can use adhesive office labels that are folded in half over the ends of each cable. Mark
the labels with the port identifiers to which the cable is connected. If you use the
recommended topologies in as described in the topics under "Host Connection" and
"Drive Connection", label each cable with the channel number noted in the table that
you are following. You can provide additional information by using color-coded cable
straps (or ties) to group all of the cables associated with one component, drive
channel, or loop.
If a component fails, you must disconnect the cables, replace the failed component,
and reattach the cables. Detailed labeling of the cables will simplify the component
replacement process.
If you add a new drive tray to an existing configuration, correctly labeled cables will
help you identify where to connect the new drive tray.
Cabling Information
Provided by
SANtricity ES
Storage Manager
After you have completed your cabling topology and installed the SANtricity ES
Storage Manager software, you can view cabling information through the SANtricity
ES Storage Manager software. The SANtricity ES Storage Manager software shows a
table that lists all of the connections in the cabling topology and identifies any
incorrectly connected drive channels or non-redundant drive channels. For more
information, refer to the online help topics in the SANtricity ES Storage Manager
software.
Adding New Drive
Trays to an Existing
Storage Array
HotScale™ technology enables you to add drive trays to an existing storage array
without interrupting power or data transfer to the storage array. See the topics under
"Drive Connection" for the recommended cabling patterns for various numbers of
attached drive trays.
For non-SAS drive connections, when the number of drive trays exceeds the number
or drive ports on a controller, the cabling pattern changes significantly. At this point,
you will use the “A” ports on the ESMs, and additional drive trays connect to the
controller tray indirectly, through other drive trays.
If you are adding additional drive trays to an existing non-SAS configuration so that
the total number of attached drive trays increases from fewer than the number of drive
ports per controller to a total that is greater than that number, you need to re-connect
some of the drive trays that were previously installed.
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