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

a
ammgr(1M) ammgr(1M)
NAME
ammgr - manages the operating characteristics of the disk array
SYNOPSIS
ammgr -D ArrayAlias [-V][-?] ArrayID
ammgr [Options][-V][
-?] ArrayID
DESCRIPTION
ammgr manages the operating characteristics of the disk array by providing access to the settings used to
control disk array operation. In most cases, these settings control the operation of the entire disk array;
consequently, every LUN on the disk array will be affected by any changes made using this command. The
exception is a parity scan, which impacts only the specified LUN.
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
ammgr supports the following options:
-b Reset battery age to zero. This should be done when the battery is replaced.
-c AA Set the controller mode to dual-active.
-d channel:ID Remove the role of hot spare for the disk at address channel:ID. The disk is identified
by channel number (1-6) and SCSI ID (0-4, 8-12).
-D ArrayAlias Assigns the text string specified by ArrayAlias to the disk array. This name is
another mechanism for identifying the disk array when executing a command. The
name can be up to 16 characters in length and can include letters, numbers, number
sign (#), underscore (_), and period (.).
Disk names can be used in a variety of ways to help identify disk arrays in large sys-
tems. For example, by assigning numbers to racks and to the shelf positions within
the racks, each disk array can be uniquely identified using an appropriate alias. If a
rack is assigned number 12, the disk array installed on shelf 3 of the rack could be
identified using an alias of 12_03. This technique simplifies locating the disk array
should it need service.
-h channel:ID Assign the role of hot spare to the disk at address channel:ID. The disk is identified
by channel number (1-6) and SCSI ID (0-4, 8-12).
-H LUN Halt a parity scan currently in progress on the specified LUN. If a parity scan is not
in progress on the specified LUN, clear the status of the last completed parity scan for
the LUN.
-L cntrlrID:percent
Sets the cache flush limit for the controller identified by cntrlrID to the value specified
by percent. When flushing write cache pages to the disk media, the flush operation
will stop when the indicated percentage is reached. The value is expressed as a per-
centage of the current cache flush threshold.
-p {4|16} Set the cache page size to 4 KB or 16 KB. The cache page size is set for both disk
array controllers. NOTE: The cache page size may not be set to 16 KB unless the
segment sizes of all existing LUNs are multiples of 16 KB.
-P LUN Perform a parity scan on the specified LUN.
HP-UX 11i Version 1: September 2005 − 1 − Hewlett-Packard Company Section 1M−−35