Table 19 Cabling principles (Brick balance in strings) (continued)
Cabling principle
Applicability
Note: The recommendation to not mix SATA Bricks (version 1)
with other Brick types overrides load factor considerations on
Brick strings.
Table 20: Cabling principles (Brick adds on strings)
defines the procedures to be
followed when adding Bricks on Brick strings within a Pillar Axiom 600 system.
Table 20 Cabling principles (Brick adds on strings)
Cabling principle
Applicability
Bricks may be added to a Pillar Axiom 600 system without
disrupting client data availability. However, considerable care
must be taken while performing non-disruptive Brick adds. If there
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.
FIELD
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.
FIELD
Chapter 4 Connect Data Cables
Cabling Practices for the Pillar Axiom 600 System
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