HP NetRAID-4M Controller - Manual (Page 41)

3-17
Working with Controllers
Note: The pause_io command is not available in the UNIX
environment.
To resume a controller’s I/O operations, use the controller
resume_io command, as in the following example. The
controller resume_io command also rescans the SCSI channels
on the controller, verifying currently connected disks and
recognizing new disks that have been added to the channels.
HPN0> controller resume_io
Executing: controller resume_io
Displaying and Enabling Controller Automatic
Spare
A spare disk is a disk that you configure to automatically recover
data from a failed partition/disk in a redundant container. To assign
one or more spare disks for a single container, you use the
container set spare command. To assign one or more spare
disks for all containers, you use the container set
global_spare command. Only mirror sets and RAID-5 sets use
the spare assignment if a disk fails. (Mirror sets and RAID-5 sets are
often referred to as redundant containers). The main characteristic of
these commands is that you must “manually” assign the spare disk
to one or more containers. In fact, you might consider the previously
described spare mechanism as “manually set spare”.
Note: Automatic spare allows you to replace a failed disk
with a replacement disk. The controller automatically
assigns the disk you insert as a spare disk without your
having to first assign it manually using the
container
set spare or c ontainer set global_spare
command.
See Chapter 9, Modifying Containers, for more information on the
container set spare and container set global_spare
commands.