Unable to add a disk to a RAID 6 pool

[vlad]

I have an F5-422 on TOS 4.2.40 (which the update function claims to be the latest version, although I see some talk here about TOS 6 already).

I started with a RAID 1 storage pool with 2 disks, then I bought 3 more disks with the intention to convert the RAID 1 pool to a RAID 6 pool with 5 disks in total.

I inserted the third disk, and migrated the pool to a RAID 5 with 3 disks.

I inserted the fourth disk, and migrated the pool to a RAID 6 with 4 disks.

I inserted the fifth disk, and now I don't have the option to edit the RAID 6 pool to add the additional disk. The edit option is grayed out. Why? This is how it looks:





Now what?

[TMeric]

Thank you for your feedback. We saw that you have solved this problem in another post:
viewtopic.php?f=79&t=2441
We no longer have this problem on TOS 5.1