About the GT 103 800
The GT 103 800 accepts three hot-swappable FireWire drives, and makes it easy to take drives between
multiple computers. Older FireWire 400 GT Keys are forward-compatible with GT 103 FireWire 800 racks,
and FireWire 800 GT Keys are backward-compatible with all GT Series FireWire 400 enclosures. Compatibility
is maintained because both versions use the same hot-swap technology, Glyph’s Integrity™ FireWire inter-
face. This integrated exchange system offers true hard drive hot-swap technology, ensuring data integrity
and consistency: removing a hot-swap drive from a Glyph FireWire system interrupts the data signal at the
FireWire bus, not on the ATA or SATA bus as with other hot-swap systems.
Configuration
The GT 103 is a JBOD, which means that each drive shows to the computer as its own drive. This configura-
tion is similar to having three FireWire drives daisy chained to your computer. The GT 103 by default does not
include any RAID configuration, although you can create RAID sets from your operation system. Windows
and Mac OS have the ability to create RAID arrays from FireWire drives.
GT Keys
GT Keys lock into the GT 103 800 chassis by means of a flip-out handle at the front of the drive. The cartridge
loads on its side and the top is marked with a “This side up” label. You can load the GT 103 with up to 3
drives, if you have empty bays, it is recommended to fill them using GT Key Blank cartridges (part# GTKEY-
BLANK) for proper airflow. GT Keys have power and activity indicator lights. When you insert a GT Key into
the GT 103 800, the power LED should illuminate solid and the activity LED should blink when there is disk
activity. GT Keys can be locked into the GT 103 chassis using the keys that are included with each GT Key.
When shipping your GT 103, remove any GT Key cartridges from the unit. When transporting an individual
cartridge, place it in the plastic carrying case that it came in. This will help ensure the safety of the sensitive
electronics exposed at the back of the cartridge. Additional carrying cases can be ordered for GT Key drives
(part# GTKEY-CASE).
Power supplies and fans
The GT 103 includes two power supplies and two fans. Power supplies are rated at 100-240v 50-60Hz. Fans
are chosen for their quiet operation and efficient cooling.
Ports
On the rear of the GT 103 800 there are two FireWire 800 ports. Officially, these are IEEE 1394b ports that run
at up to 800Mbits/sec. One of these ports should be connected to your computer, and the other should be
connected to other downstream FireWire devices. It doesn’t matter which port you connect to the computer,
they are functionally identical. If your computer has a FireWire 800 port you can use the provided FireWire
800 9-pin cable. If your computer has a FireWire 400 port only, you can use a FireWire 800 to FireWire 400
converter cable, available from Glyph (part# CAB-FW800-9/6-2). If your computer doesn’t have any FireWire
ports you will need to purchase a FireWire adapter card. Check the Glyph web site for suggestions.
The front of the GT 103 800 has a 6-Pin FireWire 400 port. This “convenience port” is intended as an easy way
to connect legacy FireWire 400 devices while the GT 103 800 is rack-mounted, without having to go around
to the back of the rack.
