A 'Dock is not connected for maximum speed' notification is shown - what should I do?
This message indicates that the Thunderbolt connection to the Dock is not at the highest possible speed.
Codex Thunderbolt Docks having the following connection types:
||PCIE OVER TB SPEED
|XR Capture Drive Dock (CDX-7513)
|SXR Capture Drive Dock (CDX-75013/75014)
|SXR Capture Drive Dock (CDX-75013-1/75014-1)
|Capture +Transfer Drive Dock (CDX-62103)
*Note that PCIe over Thunderbolt, as used by Codex Docks, cannot achieve the maximum possible bus speed as Thunderbolt reserves some bandwidth for other purposes such as display devices.
In addition, driver/software layers have overhead that limit speeds to below the maximum bus speed.
The Thunderbolt connection speed is governed by:
- the host port on the computer.
- the cable (or adapter) being used.
- possibly other devices on the same port, if daisy-chained**.
- possibly devices on another port, if multiple ports share the same Thunderbolt controller.
**For the best possible speed and reliability it is recommended to not use Codex Thunderbolt Docks as part of a daisy-chain of devices.
To resolve the situation, the following steps should be taken:
- check the port speed on the Mac from System Information > Thunderbolt.
- check the speed of the cable being used. Note that there are two types of Thunderbolt 3 cable - Passive and Active. Passive cables up to 0.5m in length can operate at 40 Gbps,
but if longer will operate at 20 Gbps. Active cables can operate at 40 Gbps over longer distances.
- if the Dock is daisy-chained to the Mac, use a direct connection instead with no other devices on that port.
- if there are devices on another port, check that they are not downgrading the port speed available for the Dock. Note that the Mac Pro (2013) has 6 ports which share 3
Thunderbolt controllers, as outlined at https://support.apple.com/en-gb/HT202801