On Sat, 19 Jan 2019 11:37:11 -0500 Eric Pulvino <ericpulvino@xxxxxxxxx> wrote: > root@helios4:/# mdadm --grow /dev/md0 --size=5860267008 > mdadm: Cannot set device size for /dev/md0: No space left on device Read `man mdadm` for --size. What you need is --array-size. -- With respect, Roman