Sata device in a USB docking station problems.

[Nataraj]

On 03/12/2012 11:56 PM, George R Goffe wrote:
> Hi,
>
> I'm having a bit of a problem with some SATA drives in docking
> stations connected to USB ports.
>
> The problem seems to be unrelated to heavy I/O and occurs randomly.
> Once, without the drive even being mounted.

Did this configuration ever work well for you in the past and did the
problem change with any kind of kernel upgrade or reconfiguration of the
drives or cabling?

Unfortunately I've seen this problem way too many times, especially with
multiport Jmicron controlers such as the one that you have.  I've
occasonally been able to solve it by changing or reseating the cabling. 
Also make sure the drives are firmly seated in the docking station.  On
some systems no matter what I do, if I do simultaneous IO to more than
one USB drive I get errors like this (I know you say it is not IO
related).  In some cases it works better to use only a single drive per
controller and plug a second drive into a port on a different usb
controller if your system has more than 1.  If it doesn't work in one
dock socket, try the other.  Some of the controllers in these multiport
USB peripherals just don't work well with linux  drivers or with the usb
controller on a particular computer.

I wish I had a better answer for you, but I think this is a pretty
common problem with this type of commodity hardware.  I have some
systems where it seems to work just fine and others where no matter what
I do it won't work.

Nataraj

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