FAQ - Frequently Asked Questions - Knowledge Base

Why does my drive disconnect from my Mac?

There could be different reasons why an external drive suddenly disconects, so if possible, it's best to try and narrow down the problem by testing different configurations and settings. Following are some tips on how to troubleshoot such an issue:

 

Disk sleep

  1. On your Mac, go to Preferences.
    energy saver 01
  2. Open Energy Saver.
    energy saver 02
  3. Disable the option to put hard disks to sleep when possible.
    energy saver 03
  4. If you are using a laptop, you might have to do this twice, once for Power Adapter and once for Battery, depending on when the problem occurs.
    energy saver 04

 

Faulty drive or issues with a RAID set

  1.  If you are using Software RAID, backup all your data in a different location first.
  2. Remove the RAID set and erase the individual disks. Use Mac OS Extended when formatting the disks.
  3. See if the problem still occurs. If yes, swap the disks and check if the problem follows a certain disk or stays with one particular drive slot. Depending on the results, either replace the faulty disk or return the device for repair.
  4. If you were using Software RAID and everything works after removing the RAID set, re-create the RAID set and test the disks again.

 

Issues with the cable

  1.  Make sure the cable is plugged in securily.
  2. Plug the cable into a different port, both on the device and on the computer.
  3. If available, temporarily replace the cable.

 

Faulty port

  1.  Plug the cable into a different port, both on the device and on the computer.
  2. Make sure the device is connected directly to the coputer and not behind another device.
  3. Check the system report to see if the device is still recognized.
  4. Test the device on a different computer.