This read-create TruthValue indicates whether only SCSI read operations are allowed on this zone's members that are SCSI targets; true restricts the zone to read-only, false permits both SCSI read and write. Admins use this to protect storage targets in a specific zone, such as backup or archival targets, from write access. For example, an admin creating a zone for backup destination arrays might set this object to true to prevent accidental overwrites via that zone.