CLI Guide

● OK
● Degraded
● Fault
● N/A
● Unknown
Reason
If Health is not OK, this field shows the reason for the health state.
Action
If Health is not OK, this field shows recommended actions to take to resolve the health issue.
Examples Show information about all linear disk groups.
# show vdisks
Show information about linear disk group vd0002.
# show vdisks vd0002
Base types
virtual-disks
status
See also
create vdisk
delete vdisks
expand vdisk
set vdisk
show vdisk-statistics
Description
Shows live or historical performance statistics for linear disk groups. This command applies to linear
storage only.
You can view live statistics for all or specified disk groups, or historical statistics for a specified disk
group. For disk-group performance statistics, the system samples live data every 30 seconds and
historical data every quarter hour, and retains historical data for 6 months.
The historical option allows you to specify a time range or a number (count) of data samples
to include. It is not recommended to specify both the time-range and count parameters. If both
parameters are specified, and more samples exist for the specified time range, the samples' values
will be aggregated to show the required number of samples.
For each disk group these statistics quantify destages, read-aheads, and host reads that are cache
misses. For example, each time data is written from a volume’s cache to disks in the disk group that
contains the volume, the disk group's statistics are adjusted.
Properties shown only in API format are described in API basetype properties.
NOTE:
● Values for the amount of data transferred and for data throughput appear to be much higher
in historical output than in live output. This is caused by a difference in the way that historical
and live values are calculated.
● Live values are calculated based on the vdisk as viewed from the controller cache perspective.
In the live statistics, performance numbers are obtained by accounting for when data is
written from cache to disk or is read from disk to cache.
● Historical data is obtained by using the summation of the disk statistics for the disks in the
vdisk. The historical vdisk data shows transfers to and from the disks in the vdisk that include
the overhead of any RAID transfers as well as any host activity.
● Because I/Os from the RAID engine are included, values for the historical data appear higher
than the numbers for the live data.
Alphabetical list of commands 261