Replace more than one active disks

This topic describes how to replace more than one active disk.

If you want to replace more than one disk used in file system, and if you have a lot of files or data in the file system, it will take long time to do this if you are using the mmrpldisk command for each disk.

If you have additional idle disk slots, you can plug new disks into these idle slots and run mmcrnsd to create new NSD disks against the disks that are to be added, run mmadddisk (without the option -r) to add the new disks into the file system and then mmdeldisk the disks that are to be replaced by using mmdeldisk.

Note: If you place new disks in the same failure group of the disks that are to be replaced, the above operations will maintain the data locality for the data from disks that are to be replaced. IBM Storage Scale keeps the data in the original failure group.

If you do not have additional idle disk slots, run the mmdeldisk command on the disks that are to be replaced, run mmcrnsd to create the NSD disks and run mmadddisk to add the NSD disks to the file system. You might have to run mmrestripefs -b to balance the file system but this breaks the data locality.