wipe disks

I have upgraded my cluster to new boot drives using zfs1 mirroring on sdc and sdd. All is going well. I want to remove the old drives from the chassis. I wanted to wipe the drives using proxmox before I do. I am trying to remove sda When I try to wipe the drive I get the error `disk/partition...

Hello everyone, I hope you're all well. I've been struggling to wipe a Disk located a /dev/sdb. but shows as disk full. and it shows that disk size different here Support appreciated, Devrimer

I have some previously used in another project disks I wish to use with proxmox backup server but I can't figure out how to wipe the disks to be able to setup a datastore. I'm in the admin > Storage/Disks tab and I don't see a wipe disk button. I looked at the storage help article...