OWC Jellyfish

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Setup and Installation

Frequently Asked Questions

Here are some answers you might find helpful. If you aren't seeing what you are looking for, please check the rest of our knowledge base or contact our team.

1. I upgraded my macOS and now I can’t mount

2. OWC Jellyfish gets disconnected from my Mac.

  • If this happens when you step away for a bit, make sure your energy settings are set so your Mac doesn’t go to sleep, as this interrupts network connections.
  • If you are using macOS Catalina, you might have a common network issue present this macOS version, and it might be a good idea to upgrade to Big Sur (make sure you check compatibility for your other hardware and software peripherals).
  • You may also need to replace your cable, as a loose or damaged cable can lead to erratic performance and poor stability.

3. I’ve got slow speeds on a 10GbE port

  • Check your MTU settings by going to System Preferences > Network. Select the network interface you are using for your OWC Jellyfish, click advanced, and then go to Hardware. On the bottom, you will have MTU. Change it to custom and type in 9000, then save and apply changes.
  • If your computer doesn’t see the OWC Jellyfish, please check in System Preferences -> Network if you are able to see the network interface connected to the OWC Jellyfish and make sure it is active (with a green light or yellow light)
  • If you don’t see it at all you may have a bad adapter, an adapter that is not turned on, a bad Thunderbolt cable. You may also need to add it manually to the list by clicking the + button and selecting the Thunderbolt Ethernet or Ethernet interface and Apply those changes.
  • If you see the interface but it is not active try removing it and adding it again using the - and + buttons at the bottom of the networks list. Save those settings
  • If you still don’t see it, make sure that the OWC Jellyfish is on. Also make sure that your Thunderbolt Ethernet adapter is powered on. Check the Advanced settings for the interface and make sure it’s set to 10G connection. Some network ports on the OWC Jellyfish require 10G connection and cannot work with 1G. If you still don’t see the connection as active, please replace your ethernet cable.

4. What are the normal speeds for the 10GbE connection?

  • The speeds may vary depending on your 10GbE adapter, your computer configuration, the OS and the version of OS you are using. In some configurations it is normal to get over 900mbps for read and write, while for others it is normal to get about 600mbps. That doesn’t mean necessarily that there is anything wrong with your OWC Jellyfish, but if you are unhappy with the performance you’re getting, we would be happy to take a look and see if it's possible to optimize any of your settings.

5. Should I have a backup of the OWC Jellyfish?

  • Absolutely. Data loss can happen unexpectedly, by events that cannot be predicted or prevented. It may be a catastrophic event like a flood, or something like a member of your teem accidentally deleting a file they weren’t supposed to. We will always do everything in our power to help you preserve your data, but OWC does not carry any responsibility for data loss.

6. How often should I check the health of my OWC Jellyfish?

  • We recommend that you make it a weekly habit to check on a Monday. That way if there is a hard drive that has gone bad, you will catch it early on, before a second one does.

7. How long does a scrub take?

  • Depending on how much data you have on your drives, a scrub can take between 4 to 48 hours and sometimes even more.