HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

a
amutil(1M) amutil(1M)
NAME
amutil - controls various disk array management functions
SYNOPSIS
amutil {[ -f channel:ID,channel:ID... ]|[
-F ]|[-s ]|[ -R LUN
-f Freq -a Amt ]|
[
-p ]|[-l ]}[
-V ] ArrayID
amutil -?
DESCRIPTION
amutil controls a variety of management operations on the disk array identified by ArrayID.Locating
hardware components and managing the rebuild process are done using
amutil.
The ArrayID used to address the disk array can be the disk array serial number or name, if one has been
assigned to the disk array.
Identifying Disk Modules
Disk modules are identified within Array Manager 60 using a numbered pair of the form n:n. The first
number identifies the SCSI channel (or bus) connecting the array controller to the enclosure containing the
disk module. The channel number is indicated on the back of the array controller enclosure. The second
number is the disk module SCSI ID. The SCSI ID is determined by the slot in which the disk module is
installed, but is not the same as the physical slot number (0-9).
For example, the numbered pair
2:1 identifies the disk module on channel 2 with a SCSI ID of 1. Refer to
the Disk Array FC/60 User’s Guide for more information on disk module addressing.
Options
amutil supports the following options:
-f channel:ID,channel:ID...
Flash the amber LED on the specified disks. Each disk is identified by channel:ID.
Channel:ID is determined by the disk enclosure channel number (1-6) and disk SCSI
ID (0-4, 8-12).
-F Flash the amber LEDs on all the disks in the disk array.
-l Flush server log file. This will retrieve the current log entries from the disk array
controller. The controller logs will be cleared.
-p Purge the oldest log file (delete the log file and remove its entry from the log file cata-
log). Always use this option to delete log files. Using a system command such as rm
to delete log files will cause log catalog errors.
-R LUN -f req -a Amt
Set the rebuild priority settings of the specified LUN. The freq value identifies the
rate at which the disk array attempts to execute rebuild commands. Specified in
tenths of a second, this value can be 1 to 50, or 0.1 seconds to 5.0 seconds. A low set-
ting increases the frequency at which rebuild commands are issued, giving higher
priority to the rebuild but reducing I/O performance. A high value reduces the rebuild
command frequency, giving higher priority to host I/Os. The default value for this set-
ting is 1, or 0.1 seconds.
The Amt value identifies the number of blocks to rebuild at a time. This value can be
from 1 to 64K and specifies the number of 512-byte blocks processed during each
rebuild command. The higher the setting the more blocks which will be processed,
thus reducing I/O performance. A lower setting gives priority to host I/Os, delaying
the completion of the rebuild. The default value for this setting is 64 blocks, or 32
Kbytes of data.
-s Stop flashing disk activity lights. This option is used to stop the flashing on all disks.
-V Verbose mode displays additional command execution, state, and/or status messages.
-? Display extended usage message. This option overrides all others.
SECURITY CONFIGURATION
This command is modified for all security configurations.
HP-UX 11i Version 1: September 2005 − 1 − Hewlett-Packard Company Section 1M−−39