I have a 4 disk RAID6 on an HP P420i (w/FBWC + battery module) that I need to upgrade with larger disks.
I was going to replace each disk in turn then wait for array rebuild until all 4 were replaced. Can I power down individual disks in the array (possibly using software like HP Smart Storage) so I can do this while 'hot' or is it safe to just remove a disk from an online array without any preparation? I'd like to avoid turning the machine off at all if it's possible.