CLI Guide

● device mirror-isolation disable
● device mirror-isolation enable
● device mirror-isolation show
● Dell EMC Administration Guide for metro node
device mirror-isolation disable
Disables mirror isolation on the specified clusters.
Contexts
All contexts.
Syntax
device mirror-isolation disable
[-c|--clusters] context-path [, context-path...]
[-f|--force]
[-h|--help]
[--verbose]
Arguments
Optional arguments
[-c|--clusters] context-path [,
context-path...]
Specifies the list of clusters on which to disable mirror isolation.
[-f|--force]
Forces the operation to continue without confirmation.
[-h|--help]
Displays command line help.
[--verbose]
Provides more output during command execution. This may not have any effect for
some commands.
Description
A RAID 1 mirror leg built upon a poorly performing storage volume can bring down the performance of the whole RAID 1 device
and increase I/O latencies to the applications using this device. Metro node prevents I/Os to these poorly performing mirror legs
to improve the RAID 1 performance. This behavior or feature is known as mirror isolation.
When disabling the mirror isolation feature on one or more clusters, this command prints a warning and asks for confirmation.
NOTE:
This command disables the mirror isolation feature and prevents metro node from improving the performance of a
RAID 1 device containing a poorly performing mirror leg. This command should only be used if redundancy is desired over
RAID 1 performance improvement.
Examples
Disable mirror isolation on all clusters:
VPlexcli:/> device mirror-isolation disable
Disabling the mirror isolation feature will prevent metro node from improving the
performance of a RAID-1 device containing a poorly performing mirror leg. This command
should be only used if redundancy is desired over RAID-1 performance improvement.
118
Commands