Dell PowerVault ME4 Series Storage System CLI Guide

Shows live performance statistics for disk groups. The command will show information for all disk groups by default, or you can use parameters to filter the output. For disk-group performance statistics, the system samples live data every 30 seconds.

Properties shown only in API format are described in API basetype properties.

show disk-group-statistics

[disk-group disk-group]

[type linear|virtual]

Optional. Specifies the disk group for which to show information. If this parameter is omitted, information will be shown for all disk groups. A value that includes a space must be enclosed in double quotes.

Optional. Specifies whether to show information for linear disk groups or for virtual disk groups. If this parameter is omitted, information will be shown for both types.

The name of the disk group.

The amount of time, in seconds, since these statistics were last reset, either by a user or by a controller restart.

Number of read operations since these statistics were last reset or since the controller was restarted.

Number of write operations since these statistics were last reset or since the controller was restarted.

Amount of data read since these statistics were last reset or since the controller was restarted.

Amount of data written since these statistics were last reset or since the controller was restarted.

The data transfer rate, in bytes per second, calculated over the interval since these statistics were last requested or reset. This value will be zero if it has not been requested or reset since a controller restart.

Input/output operations per second, calculated over the interval since these statistics were last requested or reset. This value will be zero if it has not been requested or reset since a controller restart.

Average response time in microseconds for read and write operations, calculated over the interval since these statistics were last requested or reset.

Average response time in microseconds for all read operations, calculated over the interval since these statistics were last requested or reset.

Average response time in microseconds for all write operations, calculated over the interval since these statistics were last requested or reset.

Shown for a virtual disk group. The rate, in pages per minute, at which pages are allocated to volumes in the disk group because they need more space to store data.

Shown for a virtual disk group. The rate, in pages per minute, at which pages are deallocated from volumes in the disk group because they no longer need the space to store data.

Shown for a virtual disk group. The number of 4-MB pages that have been automatically reclaimed and deallocated because they are empty (they contain only zeroes for data).

Shown for a virtual disk group. The number of 4-MB pages that host systems have unmapped per minute, through use of the SCSI UNMAP command, to free storage space as a result of deleting files or formatting volumes on the host.

# show disk-group-statistics

# show disk-group-statistics disk-group dg0001

reset all-statistics

reset disk-group-statistics

show disk-groups

reset disk-statistics