Sonnet-technologies Echo Express SE II User Manual download pdf (Page 13)

Chapter 5 – Tips, General Information, and Known Issues

KNOWN ISSUES

Not all PCIe Cards Will Perform at 100%

Thunderbolt’s PCIe bandwidth is limited to 10Gbps. While many

cards will operate at full performance, some may not due to the

fact they require more bandwidth than Thunderbolt is capable of

delivering.

OS X Updates May Break Compatibility

Specific device drivers that work under one version of OS X

may not work under a later version. Before updating to the

latest OS, we recommend that you contact your PCIe card’s

manufacturer to verify that the existing drivers work. Note

that other software updates for the computer may also break

compatibility.

Some Devices’ Performance May be Affected by Where They

Are Connected in a Thunderbolt Chain

However small, Thunderbolt introduces latency to a device chain.

If you expand with additional Thunderbolt expansion chassis,

you may need to experiment with which cards work better in

chassis closer to or farther from the computer in the chain.

PCIe CARDS ARE NOT HOT-PLUGGABLE!

Never install a PCIe card into Echo Express SE II while it is

connected to a computer or power outlet! If you do, you risk

injury, and damage to the card, chassis, and computer.

TIPS, GENERAL INFORMATION

Keeping the Cards Cool

With its optimized airﬂow design and temperature-controlled

fan providing cooling at all times, Echo Express SE II provides

adequate cooling for the installed cards. Do not operate the Echo

Express SE II with its cover off, and do not block any of the vents!

Otherwise, the cards and chassis’ components may overheat.

Hot Plugging the Echo Express SE II Expansion Chassis

When a certiﬁed Thunderbolt-compatible card (used with

Thunderbolt-compatible drivers) is installed in the Echo Express

SE II, you may connect and disconnect the chassis while the

computer is on. Of course, if you have anything connected to

the card, such as storage devices, cameras, etc., follow proper

procedures for disconnecting those devices before unplugging the

Echo Express SE II chassis.

There’s No Power Switch and No Need to Unplug the Power

Adapter

Because the Echo Express SE II automatically powers on and off

with the computer to which it’s connected, there’s no power

switch, nor is there any need to disconnect the power cable

under normal use.

Power Indicator Operation

Because the Echo Express SE II chassis automatically powers on

and off with the computer to which it’s connected, its power

indicator only lights when the computer is on, and turns off

when the computer is sleeping or powered off. Note that the

power adapter’s power indicator remains lit as long as it is

connected to a live power outlet.

Connecting Additional Thunderbolt Devices

You may connect up to six Thunderbolt devices total in a daisy

chain, including the Apple Thunderbolt Display.

Using Expansion Cards Without Drivers

Some Thunderbolt-compatible expansion cards, like Sonnet’s

Allegro

™

FW800 PCIe FireWire

adapter and Sonnet’s Tempo

™

SATA Pro 6Gb eSATA cards, use drivers built into the OS.

Some PCIe Cards May Not Fit in Echo Express SE II

Cards installed into Echo Express SE II must be no more than

7.75" (16.76 cm) long.

Adding or Replacing a Card

Shut down the computer, and then disconnect the power adapter

and Thunderbolt cables from the Echo Express SE II before

disassembling the chassis and installing or replacing a card.

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