Sun Fire V445 Server Administration Guide - SCN Research

About the SAS Backplane
The Sun Fire V445 server includes a single SAS backplane with connections for up to
eight internal hard disk drives, all of which are hot-pluggable.
The SAS disk backplane accepts eight, low-profile (2.5-inch), SAS disk drives. Each
hard disk drive is connected to the backplane with a standard SAS hot plug disk
connector, which makes it easy to add or remove hard disk drives from the system.
Disks using SCA connectors provide better serviceability than disks using other
types of connectors.
For information about installing or removing a SAS backplane, refer to the Sun Fire
V445 Server Service Manual.
Configuration Rules
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The SAS backplane requires low-profile (2.5-inch, 5.08-cm) hard disk drives.
The SAS disks are hot-pluggable.
For information about installing or removing the SAS backplane, refer to the Sun Fire
V445 Server Service Manual.
About Hot-Pluggable and Hot-
Swappable Components
In a Sun Fire V445 server, the SAS disk drives are hot-pluggable components. Hotpluggable
components you can install or remove while the system is running,
without affecting system operation. However, you must prepare the OS prior to the
hot-plug operation by performing certain system administration tasks.
The power supplies, fan trays, and USB components are hot-swappable. Hotswappable
components you can remove and replace without software preparation
and without affecting system operation. No other components are hot-swappable.
Caution – You must always leave in place a minimum of two operational power
supplies and one operational fan tray in each of the three fan tray pairs.
Chapter 4 Configuring Hardware 79