Help! Ext HD's Disconnecting

[woodythecat]

Hey Group - I'm a bit baffled - Here is what I have:

2015 MacBook Pro 15" Retina
2015 MacBook Air 11"
2012 MacBook Pro 13"

I have the 30" Apple Cinema Display and every time I connect my laptops to it - my 3 external HD's to it - they randomly disconnect from ALL but my MacBook Air 11"....

Ideas? Anyone?

EDIT: My apologies - I wasn't very clear - I have my 3 ext drives connected to a powered hub - NOT - to the monitor - the usb hub attaches to my laptop.

 

[Fishrrman]

"I have the 30" Apple Cinema Display and every time I connect my laptops to it - my 3 external HD's to it - they randomly disconnect from ALL but my MacBook Air 11"...."

Patient to doctor:
"Doctor, it hurts when I do this..."
Doctor to patient:
"Then... don't do that."

My suggestion:
STOP connecting the drives to the Cinema Display.
If they're USB drives, try a powered hub instead (make sure it's a POWERED hub).

 

[woodythecat]

"I have the 30" Apple Cinema Display and every time I connect my laptops to it - my 3 external HD's to it - they randomly disconnect from ALL but my MacBook Air 11"...."

Patient to doctor:
"Doctor, it hurts when I do this..."
Doctor to patient:
"Then... don't do that."

My suggestion:
STOP connecting the drives to the Cinema Display.
If they're USB drives, try a powered hub instead (make sure it's a POWERED hub).

Thank you for your helpful (?) albeit, condescending reply - BUT - I didn't really specify, so that's on me.

They were on a powered USB 3.0 hub - and after MUCH troubleshooting - AND discovering that this is a fairly common issue with LOTS of others - ironically, I discovered that by REMOVING the powered hub and just putting my 3 drives on a NON-POWERED hub - fixed the problem immediately.

Problem solved.