StorCase Technology S20A133 - Manual (Page 11)

4 Introduction
StorCase Technology, Inc. S20A133 User's Guide - Rev. A02
Receiving Frame Front Panel
(Figure 3)
Key Lock/Drive Power Switch: Performs three (3) functions. The key lock assures
proper seating of the device carrier within the receiving frame, turns power to the device
carrier on and off, and prevents unauthorized removal or installation of the carrier. For the
computer to access data on the DE300 disk drive, the key must be turned counterclockwise
to the locked position.
The key may also be permanently attached to the locking mechanism as shown in Appendix
B.
NOTES: The lock on the DE300 receiving frame functions as a lock and a DC power
switch for the carrier unit. The lock MUST be engaged (turned counter-
clockwise) in order to supply power to the carrier and installed drive unit.
The built-in blowers will NOT turn on if there are no drives installed! A
minimum of one (1) drive installed (with the key lock engaged) is required
to activate the built-in blowers.
Unit ID Number Indicator: Displays the physical SCSI address of the DE300 device carrier
if the carrier is Installed and Locked in the receiving frame or if the carrier is Removed from
the receiving frame. If the carrier is Installed but Not Locked in the receiving frame, a "u" will
be displayed to indicate an unlocked condition. The unit ID number is selected by means of
the unit ID select switch inside the receiving frame using a special alignment tool supplied with
the DE300.
Fan Failure LED: The unit ID number indicator will display a flashing "F", and an
audible alarm will sound to indicate a blower failure.
Activity Indicator: A small dot next to the Unit ID Number which illuminates to show
when the host computer is accessing the data on the DE300 carrier. This dot will
flash during communication with the host computer.
Device Spin Down/Up Timer: This feature allows the receiving frame unit ID number display
to provide a visual indication of drive spin down/up activity. A small timing switch located on
the side of the receiving frame allows the operator to ad-just the timer to match the specific
drive manufacturer's specifications (Figure 10).