The drives appear to be configured to Power Up In Standby (PUIS). This setting can either be programmed by way of the drive’s PM2 jumper, or it may be a user configurable firmware setting.
PUIS can be disabled with a tool such as HDAT2. HDAT2 must be launched with the /W option to wake up the drives. Another possible solution is “sudo hdparm -s0 /dev/ice”.