SED requires a key server to function or a utility to manually enter a password. sedutil appears to be the go-to on linux assuming it's not your boot drive: h

SED requires a key server to function or a utility to manually enter a password. sedutil appears to be the go-to on linux assuming it's not your boot drive: https://wiki.archlinux.org/title/Self-encrypting_drives#Encrypting_a_non-root_drive https://wiki.archlinux.org/title/Self-encrypting_drives#Encr... In the enterprise we use external keyservers like the ones Thales sells.