my 4 brand new WD20EZRX-00D8PB0 (retail with full warranty) make constant head activity.
all self tests and a full write and read (compare) with h2testw were successful.
they also make that sound when they’re only powered without any sata connection.
what is it and will it ever stop ?
i cant remember that any of my other wd disks ever made such stuff:
here you can listen: