Sun Microsystems SPARC Series, Service Manual

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Chapter 4 FRU Replacement Preparation 4-5
4.3 Active Replacement/Active Addition
In active replacement, the target FRU is operated while the Solaris OS of the domain
to which the FRU belongs is operating.
The target FRU is operated using Solaris OS commands or XSCF commands.
Because the power supply unit (PSU) and fan unit (FAN) do not belong to any
domain, they are operated by using XSCF commands regardless of the operating
state of the Solaris OS.
Active replacement has the following four stages:
■
“Releasing a FRU from a Domain” on page 4-5
■
“FRU Removal and Replacement” on page 4-6
■
“Configuring a FRU in a Domain” on page 4-6
■
“Verifying the Hardware Operation” on page 4-7
For active installation, see Section 4.3.3, “Configuring a FRU in a Domain” on
page 4-6 and " Section 4.3.4, “Verifying the Hardware Operation” on page 4-7 .
4.3.1 Releasing a FRU from a Domain
1. From the Solaris OS, type the
cfgadm
command to obtain the component
status.
2. Stop the application from using the component and disconnect the component
from the Solaris OS.
The READY LED (green) of the HDD goes off.
Note – If a hard disk drive is an unmirrored boot device, it must be replaced by
using the cold replacement procedure. However, if a boot device can be
disconnected by means of a Solaris OS function or disk mirroring software function,
active replacement can also be performed.
3. Type the
cfgadm -c
command to disconnect the component from the Solaris
OS.
# cfgadm -a
# cfgadm -c unconfigure
Ap_Id