LaCie 12big Rack Serial InstallationUser Manual page 212.5.1.1. Drive Spindle StartDrive spindle start is automatically controlled via the I/O modulescontrolling the power control circuit of the Backplane. With two ac-tive PSUs present all drives will start immediately. If only a singlePSU is present then the system will start in two groups of 6 drives,separated by a 12 second delay.2.5.2. Engaging the Drive Carrier Anti-tamper LocksThe anti-tamper locks are fitted in the drive carrier handles and areaccessed through the small cutout in the latch section of the handle.Drives are supplied with the locks set in the locked position.2.5.2.1. Activating the Locks1. Rotate the torx driver provided in a clockwise direction until theindicator is visible in the aperture beside the key.2. Remove the key.De-activation is the reverse of this procedure, that is: rotate thetorx driver in an anti-clockwise direction until the indicator is nolonger visible in the aperture beside the key.NOTE: A drive carrier cannot be installed if its anti-tamper lock isactivated outside the Enclosure.Fig. 21 - Activating the Anti-tamper Lock