USB 3.0 not working on Port Replicator series 3 with T520

[originaltroi]

I recently got a Lenovo T520 with a Port replicator series 3. The only reason I wanted the replicator is because there's a USB 3.0 on there. Now connecting my Transcend 2TB external harddisk isn't recognized, where my desktop PC does.

Anyone has similar issue with the replicator and USB 3.0 ?  I tried all kinds of additional drivers, but can't get it to work

[tripplec · Accepted solution]

Are you certain it will give you USB 3.0 if the notebook doesn't have it? Most ports are pass through and don't have controller chips in the dock.

I'd be surprised.

[zoltanthegypsy]

Looke like tripplec has this right.  From http://support.lenovo.com/en_US/product-and-parts/detail.page?&DocID=PD024298

Notes:

• ThinkPad T420, T420s and T520 models, USB 3.0 port on the Mini Dock Series 3 with USB 3.0 will function as a USB 2.0 port.
• Thinkpad T430, T430s and T530 models on the Mini Dock Series 3 with USB 3.0 will function as a USB 3.0 port.
• The functionality of the T420, T420s and T520 is a limitation of the Intel Chipset not a defect in either the Thinkpad or Mini Dock Series 3 with USB 3.0

I don't see that on the sales page.  Only found it by searching on the part number

Z.

[tripplec]

Your only solutions is to get a good performing Express Slot USB 3.0 Controller. Its a cheaper solution but check spec's and driver support for it. Historically USB ports with a NEC chipset were trouble free and I alway used to buy PCI boards with them for people who needed more or upgraded ports in their towers. Stay away from VIA chipset they've been a head ache for years and I've wasted so much time with driver trying to get them working properly.

I am not sure of the throughput you're going to get for USB 3.0 channeled through the Express Slot on hte 520, Currently I have eSATA chassis with both ports on it (USB 3.0) as well with a large cooling fan and 1.5TB drive for archives and backup. I am in no rush to get a Express slot solution. When I see a deal with a good chipset and reputable OEM I'll pick one up. The eSATA port is 3GB I am sure and I make a point of picking up even 2.5" chassis with eSATA & USB ports so I can run them fast if I need to.