IBM SY44-5902-05 Concurrent maintenance, Example Change Logical Hardware Resource Detail display

If you are powering off a power domain containing configured disk units that are not mirrored in a different power domain, it is likely that a disk unit attention SRC will appear in the operator panel display. Also, some or all server activity could stop until the domain is powered back on and the disk units

Change Logical Hardware Resource Detail

Description . . . . . . . . . . . . : Communications IOP

Type-Model . . . . . . . . . . . . : 2620-001

Status . . . . . . . . . . . . . . : Operational

Serial number . . . . . . . . . . . : 10-3157011

Current resource name . . . . . . . : CC08

Type changes, press Enter.

New resource name . . . . . . . . . CC08

F3=Exit	F5=Refresh	F6=Print
F9=Display detail		F12=Cancel

Figure 19. Example Change Logical Hardware Resource Detail display

Concurrent maintenance

From packaging displays

The Concurrent Maintenance option is available only on the packaging hardware resources displays.

This option provides the capability to power off a subset of the server and perform service actions on hardware in that subset. Other parts of the server remain powered on and functional. Service actions supported include replacement, upgrade, removal, addition, and movement of hardware.

The subset of server hardware that you power off in order to shut down a particular piece of hardware is known as the power domain for that piece of hardware. The power domain of a piece of hardware is determined by the granularity of the power control system. For example, the power domain of an I/O processor on an SPD bus is the frame in which the SPD bus resides. This is because the power control system for SPD busses does not support powering individual I/O processor slots on and off. In contrast, the power control system for PCI busses does support powering individual I/O card slots on and off. Consequently, the power domain for an I/O card on a PCI bus is the card itself.

There are some restrictions on hardware resource concurrent maintenance which are enforced by the operating system.

Some of the more common restrictions are as follows:

vYou cannot power off some I/O towers without powering off the entire server.

Chapter 2. Hardware Service Manager 63