Disk folder requires 1 additional disk

Hi, I wonder if it might be possible that the warning is valid and you might need an additional 10K disk to meet your backup needs. I would try the following to see if it solves it. But frankly, let's see how the community contributes 

• Stop the RAID rebalance if it is running.
• Select the disks that you want to release and click Release. This will move them to the Unassigned folder.
• Wait until the unallocated percentage of the released disks is zero or the disks appear as unassigned.
• Select the disks that you want to assign and click Assign. This will move them to the Assigned folder.
• Select the disk folder that needs more disks and click Add Disks. This will add the assigned disks to the disk folder.
• Start the RAID rebalance to redistribute the data across the disks.

adding my 2 cents. sounds like it does just need another disk added like what Dell-Ermno said. For example i have a sc4020 that needed 6 drives. 4 were in raid with 1 being parity and then it needed one more as a managed spare. 

thanks for your answers.

I understand, that it wants new disk but I can't understand - why?

couple years ago we had active optimize contract with dell and our manager told me that SC can lose many disks. the most important thing is to have enough free space for rebuild and to support selected redundancy. but actually after 1 disk is lost and removed from service I see warning.. so where is the truth and what should I do? just mark warning as anknowleged?

SC8000

7 enclosuers, 87 10K disks, 68 read-intensive ssd's.