A customer with several modern Dell servers wanted to expand the RAID 1 arrays on each, and I was able to do this without backup-and-restore to external media: this saved a ton of time (though I did do a backup up front just-in-case).
This was useful enough that I wrote it up in a Tech Tip, in the hopes it may be helpful to others:
But two important notes:
- RAID1 only — will not work with any other level
- PERC6/i only — has not been tested (or even looked at) on any other controller