Managing Systems and Workgroups: A Guide for HP-UX System Administrators

Administering a System: Booting and Shutdown
Shutting Down Systems
Chapter 5530
computer C, which was shut down without notice. It is important for the
administrator of computer B to warn the administrator of computer A to
unmount any NFS-mounted file systems from computer B,orcomputer
A will also need to be rebooted as an indirect consequence of computer C
being shut down.
NFS Client
Provided that NFS clients are not also acting as NFS servers for other
computers (computer B in the preceding note is acting as both NFS
client and server), it is safe to shut them down without affecting the NFS
server. It will simply be necessary to remount the file system from the
NFS server when the NFS client has rebooted. This is probably done
automatically during the boot-up process.
NFS Cluster Server
If your computer is an NFS cluster server, you must be aware that all
of its NFS cluster clients will also be rebooted when you shut down the
server unless you use the -o option to the shutdown command.
NFS Cluster Client
It is relatively safe to shut down an NFS cluster client without affecting
other clients in cluster, providing that it is not also serving as a network
resource of some other type.
Avoiding a Shutdown When Possible
As described earlier, there are times when a normal, planned shutdown
is appropriate. But as server downtime becomes less desired and
accepted, on-line addition and replace functionality can help you to avoid
shutting down a server in many cases.
On-line Addition and Replacement of PCI Cards (OLA/R)
HP-UX’s On-line Addition and Replacement of PCI Cards (OLA/R)
features enable you to replace a faulty interface card or add a new
interface card to a running system, without impacting the system’s
users.
Refer to the book Configuring HP-UX for Peripherals for detailed OLA/R
concepts and procedures.