Sun Microsystems Sun Ultra 450, Manual

Page: 23 / 45

CHAPTER
3
Disk Drive Hot-Plug Procedures
The Sun Ultra 450 workstation and Ultra Enterprise 450 server support hot-plugging
of internal disk drives. This hot-plug feature enables you to install a new disk drive,
or remove and replace a failed disk drive, without shutting down the operating
system or powering off the system. The hot-plug procedure involves software
commands for preparing the system prior to removing a disk drive and for
reconfiguring the operating environment after installing a new drive.
Caution - Drives should not be pulled out randomly. If the drive is active, you must
stop that activity before removing the drive. This can be done without bringing
down the operating system or powering down the system. The system supports
hot-plugging, but there are software considerations that must be taken into account.
Follow the procedures in this document when removing, replacing, and adding
drives.
Overview
Hot-plug reconfiguration or hot-plug operations cannot be performed on an active
disk drive. All disk access activity must be stopped on a disk drive being removed or
replaced.
In general, hot-plug reconfiguration operations involve three separate stages:
1. Preparing for hot-plug reconfiguration
2. Adding, replacing, or removing a disk drive
3. Reconfiguring the operating environment
Three specific cases exist where the hot-plug feature is useful.
15