Hi, I’m using plugable 10 port USB hub with MakBook pro 4.1, Lion OS. Hubg power adapter is connected. I have connected powered Maxtor USB drive to it where I host Time Machine. It worked fine for a long time (a few months)
Recently I bought plugable 10 m active extension cable and connected it between hub and maxtor. Immediately I started getting Drive Disconnected message about every few hours from macos suggesting to eject it safely next time. The log also contains “media not present” errors and out of sync filesystem notifications for that drive.
What could be the problem? (I don’t think it is insufficient power related since all devices involved are powered).