First find the total disk space of the disk, then find how much of this space is used. The difference between these two totals is the available disk space.
Find the number of disks that are available on a given host.
# snmpwalk -v1 -c public hostname HOST-RESOURCES-MIB::hrStorageIndex |
This command returns a list of disks on the host, hostname:
HOST-RESOURCES-MIB::hrStorageIndex.1 = INTEGER: 1 HOST-RESOURCES-MIB::hrStorageIndex.2 = INTEGER: 2 HOST-RESOURCES-MIB::hrStorageIndex.3 = INTEGER: 3 HOST-RESOURCES-MIB::hrStorageIndex.4 = INTEGER: 4 HOST-RESOURCES-MIB::hrStorageIndex.5 = INTEGER: 5 HOST-RESOURCES-MIB::hrStorageIndex.6 = INTEGER: 6 HOST-RESOURCES-MIB::hrStorageIndex.7 = INTEGER: 7 HOST-RESOURCES-MIB::hrStorageIndex.8 = INTEGER: 8 HOST-RESOURCES-MIB::hrStorageIndex.9 = INTEGER: 9 HOST-RESOURCES-MIB::hrStorageIndex.10 = INTEGER: 10 HOST-RESOURCES-MIB::hrStorageIndex.101 = INTEGER: 101 HOST-RESOURCES-MIB::hrStorageIndex.102 = INTEGER: 102 |
The disk is indicated by the index number:
HOST-RESOURCES-MIB::hrStorageIndex.1 = INTEGER: 1 |
This output represents disk 1, /dev/dsk/c0t0d0s0
Use the snmpget command to retrieve the total storage space for that disk.
The following command would retrieve the total storage space for disk 1:
# snmpget -v1 -c public hostname HOST-RESOURCES-MIB::hrStorageSize.1 |
This command returns the total disk space at the end of the line:
HOST-RESOURCES-MIB::hrStorageSize.1 = INTEGER: 2561695 |
View a list of the disk space used by each disk.
# snmpwalk -v1 -c public hostname HOST-RESOURCES-MIB::hrStorageUsed |
HOST-RESOURCES-MIB::hrStorageUsed.1 = INTEGER: 2121747 HOST-RESOURCES-MIB::hrStorageUsed.2 = INTEGER: 0 HOST-RESOURCES-MIB::hrStorageUsed.3 = INTEGER: 0 HOST-RESOURCES-MIB::hrStorageUsed.4 = INTEGER: 0 HOST-RESOURCES-MIB::hrStorageUsed.5 = INTEGER: 11 HOST-RESOURCES-MIB::hrStorageUsed.6 = INTEGER: 48 HOST-RESOURCES-MIB::hrStorageUsed.7 = INTEGER: 1892576 HOST-RESOURCES-MIB::hrStorageUsed.8 = INTEGER: 0 HOST-RESOURCES-MIB::hrStorageUsed.9 = INTEGER: 130565552 HOST-RESOURCES-MIB::hrStorageUsed.10 = INTEGER: 26036932 HOST-RESOURCES-MIB::hrStorageUsed.101 = INTEGER: 55995 HOST-RESOURCES-MIB::hrStorageUsed.102 = INTEGER: 17171 |
Use the snmpget command to view the storage used by the disk in question.
# snmpget -v1 -c public hostname HOST-RESOURCES-MIB::hrStorageUsed.1 |
This command returns the disk space used on disk 1:
HOST-RESOURCES-MIB::hrStorageUsed.1 = INTEGER: 2121747 |
Subtract this figure from the total disk space to find the available disk space:
2561695 – 2121747 = 439948