Hi there, I’ve literally just had this problem.
I have a G-Raid with Thunderbolt 8GB device.
Went to boot it up as normal and the drives didn’t spin up, they started to and then stopped leaving the device connected and with the light on but nothing showing on the desktop or the system info (i’m on a Mac Pro).
The drive is configured as Raid 1 so mirrored.
As its out of warranty I took it apart and using a desktop drive mount I tested each drive - they both span up fine, all my files in tact and both a mirror of each other - so no data lost (thank the lord for that !).
Put it all back together and same issue. I then disconnected one of the drives inside the drive case and it span up perfectly.
So my thinking is that whatever tells each drive to ‘play nice’ is not working. Does anyone know what this ‘bit’ is and whether it can be fixed or am I looking at running this as a single 4GB drive with another as a back up of where I’m up to.
Appreciate the forum’s help with this.