Sun Microsystems Sun StorEdge T3, Installation, Operation And Service Manual

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Chapter 5 Service 5-11
The battery service life is two years. When the battery approaches the end of its life
span, warning messages are sent to the
syslog
file. The first message is sent 45 days
before the end of the life span, followed by a warning message every 5 days
thereafter. Replace the power and cooling unit that contains the battery as soon you
receive these warning messages.
You can view information on the battery, including the life span, using the CLI or
Component Manager. Refer to the Sun StorEdge T3 Disk Tray Administrator’s Guide or
the Sun StorEdge Component Manager User’s Guide for instructions.
5.2.3.2 Removing and Replacing the UPS Battery
The UPS battery itself is not a serviceable FRU. To replace the battery, you must
replace the entire power and cooling unit. The warning message will indicate which
power and cooling unit needs to be replaced. See Section 5.2.2.2 “Removing and
Replacing a Power and Cooling Unit” on page 5-8 for instructions.
5.2.4 Interconnect Cards
The interconnect cards contain the interface circuitry and two connectors on each
card for interconnecting multiple Sun StorEdge T3 disk trays. The interconnect card
also contains the environmental monitor for the disk tray. If an interconnect card or
cable fails, the disk tray continues to function using the remaining interconnect card
and cable.
The interconnect cards in a disk tray are assigned a master and slave status, similar to
the controller card. If you unplug or remove the master interconnect card from the
unit and then put it back, the new status is reported as “slave.” The corresponding
interconnect card that was the slave then becomes the master. You can view the
status of the interconnect cards using the
fru stat
command on the disk tray.
There is no performance impact to the disk tray if the interconnect cards change
status, and it is not necessary to alter the state back to the original master/slave
configuration.
For more information on the
fru stat
command and other disk tray commands,
refer to the Sun StorEdge T3 Disk Tray Administrator’s Guide.
5.2.4.1 Interconnect Card LEDs
Each interconnect card has an interconnect status LED for each interconnect cable.
For the location of and information about the interconnect card status LEDs and how
to interpret them to diagnose a failure, see Section 4.1.4.3 “Interconnect Card LEDs”
on page 4-7.