USB hard drive no longer mounting

[cliverlong]

Hello,

It was a power supply problem.

I found a power supply that delivers 5V , 2.5A to the 4 ports hub, therefore 600mA per port.

I moved the hub and disk to my Home Hub router so I now have two USB disks attached to the router and visible (for read/write) on my home network. I have only the keyboard plugged into one USB port on the rpi. The two USB disks are "mapped" to xbian-xbmc File Manager and video>files. Now I can see all the files on both usb disk drives, on both xbmc and other network attached devcies such as windows pc, and I can back up one disk to the other (which was the original aim). I might plug the hub back into the rpi when I am doing the disk backup as this will probably support much faster data transfer (the router won't be part of the path of the data flow).

Regards,

Clive