Fru Categories; Hot-Swappable Frus - Sun Microsystems Netra CT Service Manual

1.5

FRU Categories

In general, the FRUs in a Netra CT server can be divided into two categories:
Hot-installable/replaceable (referred to hereafter as hot-swappable), meaning that
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you can install or remove and replace a FRU while the server is running, without
interrupting the operation of the server. This category of FRU sometimes requires
that you enter hot swap software commands before and after an installation or a
removal/replacement to incorporate the new FRU in the system correctly. For
more information on the hot swap commands, refer to
Non-hot swappable, or cold-swappable, meaning that you must halt (and, in some
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cases, also power off) the server before installing or removing and replacing a
FRU. Note that you must halt power only to the server where you would be
removing and replacing the FRUs; any other servers installed in the same chassis
can remain running.
Redundant power supplies and hard disk drives in a Netra CT 810 server are a
variation of the hot-swappable category. You can replace a single power supply in a
redundant configuration while the server is running, without having to enter any
software commands, or a single hard disk drive after you have unmounted the drive
or disengaged it if you are running a disk management software package.
1.5.1

Hot-Swappable FRUs

The FRUs listed below are hot-swappable:
I/O cards, both front-access and rear-access models
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Satellite CPU cards
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Alarm cards for both the Netra CT 810 server and the Netra CT 410 server
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Alarm rear transition cards (rear-access model only)
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Host CPU card
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Host CPU front transition card (front-access model only)
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Host CPU rear transition card (rear-access model only)
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Either of the two hard disk drives in a Netra CT 810 server
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DVD or DAT drives occupying the removeable media module
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Fan trays
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System status panels
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System controller boards
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Either of the two power supply units in a Netra CT 810 server
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1. The alarm and alarm rear transition cards are hot-swappable only if the host CPU card and system controller
board are also installed in the Netra CT server.
2. The host CPU card and the host CPU front and rear transition cards are hot-swappable only if the alarm card
and system controller board are also installed in the Netra CT server.
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Chapter 1 Preparing for FRU Installation and Replacement
Chapter 5.
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