Hello,
Based on the information you provided, it appears that your current Storage Space size is 42TB, which is less than the Total Pool Capacity of 60TB. However, the Storage Space size is including resiliency, which means that it is using some of the available pool capacity for redundancy.
If you want to increase the Storage Space size to 60TB, you will need to have at least 60TB of available pool capacity. This means that you may need to add more physical disks to the pool or remove some of the redundancy to free up more space.
Best Regards,
Hania Lian
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.