
Table 21 Cabling principles (Brick adds on strings) (continued)
Cabling principle
Applicability
is any sign of excessive disruption of the SSF fabric, disconnect
or power down the last Brick that was added to the Pillar
Axiom 600 system and contact the Pillar World Wide Customer
Support Center.
While adding new Bricks, consider rewiring the strings if the
existing Pillar Axiom system is not fully compliant with specified
cabling rules. For example: If the Pillar Axiom system has Brick
strings that mix SATA Brick (version 1) with other types of Bricks
or if a better balance (heuristic or numerical) is required between
the Brick strings to achieve performance goals. Appropriate
rewiring can help to isolate problems in the internal SSF fabric.
However, rewiring is usually a disruptive operation and thus, not
always possible.
FIELD
Recommended method for a non-disruptive Brick add:
Cable all the new Bricks to the Pillar Axiom 600 system without
powering them on. Then, power on the Bricks at the rate of one or
two at a time.
Note: When adding a Brick, verify if the Slammer FS and FC port
LEDs turn amber. If the Slammer FC and FS port LEDs continue
to display amber for three minutes, power off the Brick that was
last added to the Pillar Axiom system.
Note: When adding a Brick to a Pillar Axiom 600 system, check
for the appearance of topology discovery tasks. Topology
discovery tasks are normal if they do not repeat or last more than
five minutes. If a topology discovery task completes and then
recurs after five minutes have passed, power off the last Brick that
was added to the Pillar Axiom 600 system and contact the Pillar
World Wide Customer Support Center for assistance.
Note: After adding a Brick, check the status of the LUNs. If any
LUN goes offline, power off the last Brick that was added and
contact the Pillar World Wide Customer Support Center for
assistance.
FIELD
Alternate method for non-disruptive Brick add: (Used only when
recommended by the Pillar World Wide Customer Support Center)
FIELD
Chapter 4 Connect Data Cables
Cabling Practices for the Pillar Axiom 600 System
102