You have a 100 GB volume with the space guarantee set to volume. This volume contains two space reserved 20 GB LUNs. Both LUNs are at 50% use. You then create a Snapshot copy of the volume. No modifications were performed since the Snapshot copy was completed, and all actions were performed using the CLI.
In this scenario, how much free space does the volume have?
You have a 100 GB volume with a volume guarantee, meaning the volume's available space is reserved and not dynamically allocated. The volume contains two 20 GB LUNs, which are space reserved, meaning their full 20 GB capacity is reserved in the volume, regardless of current use. Therefore, in total, 40 GB (20 GB + 20 GB) is reserved for the LUNs. Since there are no changes or additional writes post-Snapshot, the reserved space remains 40 GB. Consequently, the remaining free space would be 100 GB - 40 GB, totaling 60 GB.
This is just simple math. 100-20-20= 60. All LUNs are thick