Use cases for mmvdisk

The following use cases provide examples of how mmvdisk can be used.

A complete use case for mmvdisk
This example assumes that there is a properly installed three-node IBM Storage Scale cluster with an ESS GL6 building block on the server pair ess01io1 and ess01io2:
Use case for multiple identical building blocks
This example demonstrates the best practice for using vdisk sets with multiple identical ESS building blocks.
Reporting file system orphans with mmvdisk
A vdisk set must belong to a single file system in its entirety.
Converting existing recovery groups to mmvdisk management
To manage existing ESS recovery group pairs using mmvdisk, you must convert them to the mmvdisk IBM Storage Scale RAID configuration structure. This task is accomplished with the mmvdisk recoverygroup convert command.
Replacing a pdisk using mmvdisk
If one or more pdisks in the recovery group is marked for replacement, the mmvdisk recoverygroup list command reports it with a yes in the needs service column.
ESS MES upgrade
Beginning with ESS 5.3.2, it is possible to grow specific ESS building blocks by adding one or two enclosures. This is called an MES (miscellaneous equipment specification) upgrade, which is performed using the mmvdisk recoverygroup resize command.

Parent topic: Managing IBM Storage Scale RAID with the mmvdisk command