ReadyNAS Ultra 4 with 4TB

StephenB wrote:
crond - 4x4TB would give you a 12 TB volume (10.9 TiB). So if your initial volume size (last default or initial install) was less than 2.9 TiB, then you would hit the 8 TiB growth limit..

my initial install was 4x2tb in raid5 -> 6tb total. I'm happy with raid but it's been up and running for over 3 years nonstop and Load/unload cycles on disks are over 1.2M or 400% of what WD recommends and warranty ended this month, so time to change them before they fail. I'm thinking about going with 4tb which should give me 12tb, so theoretically I should be able to replace disks and grow volume. I guess it will take me a week+ to replace disks one by one / rebuild raid5 / grow volume.
Do you know any side effects or caveats that I should be aware of ?

Thanks!