Storage Volume Modify
You can modify the name and description of a storage volume using this dialog. The advanced settings allow for changing settings like Read Only and iSCSI CHAP authentication policies for the storage volume. The 'Is Snapshot' option is particular to btrfs based storage pools and allows you to promote a snapshot volume to a root/primary volume.
Navigation: Storage Management --> Storage Volumes --> Storage Volume --> Modify (toolbar)
You may alter the name and/or description for the storage volume. One may also change the Storage Pool Information.
Volume block size is immutable after a volume has been created, all other settings may be adjusted after provisioning. One may also alter the CHAP Authentication or Policy Settings.