Specifications

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Cisco Wide Area Application Services Command Reference
OL-11817-01
Chapter 3 CLI Commands
show disks
Proactively Monitoring Disk Health with SMART
The ability to proactively monitor the health of disks is available using SMART. SMART provides you
with hard drive diagnostic information and information about impending disk failures.
SMART is supported by most disk vendors and is a standard method used to determine how healthy a
disk is. SMART attributes include several read-only attributes (for example, the power on hours attribute,
the load and unload count attribute) that provide the WAAS software with information regarding the
operating and environmental conditions that may indicate an impending disk failure.
SMART support is vendor and drive technology (IDE or SCSI disk drives) dependent. Each disk vendor
has a different set of supported SMART attributes.
Even though SMART attributes are vendor dependent there is a common way of interpreting most
SMART attributes. Each SMART attribute has a normalized current value and a threshold value. When
the current value exceeds the threshold value, the disk is considered to have “failed.” The WAAS
software monitors the SMART attributes and reports any impending failure through syslog messages,
SNMP traps, and alarms.
To display SMART information, use the show disks SMART-info EXEC command. To display more
detailed SMART information, enter the show disks SMART-info details EXEC command. The output
from the show tech-support EXEC command also includes SMART information.
Examples Table 3-30 describes the fields shown in the show disks details display.
Ta b l e 3-30 Field Descriptions for the show disks details Command
Field Description
Physical disk information Lists the disks by number. WAE 7300 series appliances show
information for 6 disk drives and WAE 500 and 600 series
appliances show information for 2 disk drives.
disk00 Availability of the disk: Present, Not present or Not responding,
or Not used (*).
Disk identification number and type, for example: (h00 c00i00
100 - DAS).
Disk size in megabytes and gigabytes, for example: 140011MB
(136.7GB).
disk01 Same type of information is shown for each disk.
Mounted filesystems Table containing the following column heads:
Mount point Mount point for the file system. For example, the mount point for
SYSFS is /local/local1.
Type Type of the file system. Values include root, internal, CONTENT,
SYSFS, and PRINTSPOOL.
Device Path to the partition on the disk.
Size Total size of the file system in megabytes.
Inuse Amount of disk space being used by the file system.
Free Amount of unused disk space for the file system.
Use% Percentage of the total available disk space being used by the file
system.