I have a RAID 5 with 5 3TB drives (8 in few weeks), on a Debian. There is only one ext4 partition on it, using all the space available.
Actually, due to origins of the RAID (4 drives), the ext4 fs stripe-width is set to 384. But with 5 drives, it's not good.
So, is it possible to update stripe-width with tune2fs ( tune2fs -E stripe-width=512 ) on the unmounted ext4 partition, without data loss ?