Hello Frederik Nielsen, There is not a command to do a true erasing of the drives.  It is best to remove all volumes and then reformat your SCv4020 back to factory then reinitialize your SC4020. Please let us know if you have any other questions.
Hello. I was wondering if there is a command that will let me make a erasure of disks in a SC4020?  Creating volumes and deleting them doesn't do it, yes, there is a lot of deleted info on the disks, but there are still readable data (Thinking GDPR). When i'm on the commandline and i write disk and hit enter to get subcommands that i can use for disk, it's not clear to me that there is a command that will let me erase disks / sanitize them. 
SC4020 disk erasing / sanitizing