HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Preparing the Host System
3–13HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
3–13
and to get attributes:
# hwmgr -get attribute.
See the UNIX online help for more information.
iostat utility
You can use the iostat utility to view performance statistics on Enterprise Storage
RAID Array storage units. (Set your terminal screen to 132 columns before running
iostat.)
The output from iostat shows the number of devices (LUNs) that have been defined in
the configuration file. It is much easier to interpret the output if the configuration file
contains entries for all eight devices. If the configuration file does not contain entries
for all devices, the iostat output has fewer columns and it is difficult to correlate each
column with a specific device.
For V4.0G
# iostat rznn 5 4
The output from iostat shows all devices that have device name rznn. The information
for LUN 0 is in the first column, the information for LUN 1 is in the second column,
and so forth.
# iostat rz16 5 4
rza16 rzb16 rzc16 rzd16 rze16 rzf16 rzg16 rzh16
bps tps bps tps bps tps bps tps bps tps bps tps bps tps bps tps
0 0 0 0 0 0 0 0 0 0 0 0 0 0 126 3
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1618 34
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1639 34
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1610 34
The above display shows activity on all 8 LUNs attached to one SCSI-bus (2), one
Target 0. The above list represents information on rza16, rzb16... rzh16. The device
with activity is device rzh16.
The iostat utility only recognizes device names in the format rznn where nn is
calculated as:
(8 * Host SCSI Bus #) + (HSG Target ID)
(This is the same formula and format that is used for the configuration file.)
Invoke the iostat utility using the following format: