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About the GPT50
Ports
The GPT50 enclosure contains a single hard disk drive, and has FW800, USB 2.0 Hi-speed and eSATA con-
nections. Depending on which port(s) your computer has, you can connect the GPT50 in a number of ways.
The fastest interface on the GPT50 is eSATA and there is one eSATA port on the rear panel. The GPT50 can
sustain over 130MB/sec (reads) and over 140MB/s (writes) when connected to a 4-lane PCIe eSATA card such
as the Sonnet E4P. It can sustain 125MB/sec (reads) and 100MB/s (writes) when connected to a 2-lane PCIe
eSATA card such as a Glyph EC2 card. FireWire 800 is the next fastest and there are two FW800 ports on the
rear panel. Officially, these IEEE 1394b ports run at up to 800Mbits/sec. One of these ports can be connected
to your computer, and the other should be connected to other downstream FireWire devices, if applicable.
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 FW400 to FW800 adapter cable, which is available from Glyph. If your computer
doesn’t have any FireWire ports you can either purchase a FireWire or eSATA adapter card (recommended),
or use the USB 2.0 port on the back of the GPT50.
Front panel LED
The GPT50 front panel has a single bi-color LED. The LED will display solid blue when power is on. The LED
will flash blue when there is disk activity. The LED will display red if there is a hard drive failure.
Power Switch
The power switch must be held for three seconds to power off the GPT50. After three seconds the LED will
turn off, and releasing the button will power off the unit. This is a safety precaution against unintended
power off.
Internal Power Supply
Glyph uses efficient, high-quality power supplies, selected specifically for the demands of production envi-
ronments. The GPT50 has an auto-switching universal power supply. Its input voltage can range from 100-
240v at 50/60 Hz, allowing the GPT50 to be safely used overseas.
Internal Temperature-Controlled Fan
The GPT50 has an internal temperature-controlled fan. Software inside the GPT50 sets the fan RPM to either
HI or LOW speeds. We have found that both HI and LOW fan speeds are very quiet.
Back Panel Details
The image below shows the ports and features on the back of the GPT50 chassis.