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Date: Sun, 27 Nov 2011 22:52:34 +0200
From: Alan McKinnon <alan.mckinnon@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] USB Drive Mount
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On Sun, 27 Nov 2011 15:08:10 -0500
sean <tech.junk@myfairpoint.net> wrote:
> I have two 500GB USB drives that my Gentoo system here will not read.
> Both these drives are fat formatted.
>
> The tail of DMESG, the entries actually go on for a long long time,
> has the following report for either of those two drives,
> [ 6027.085508] ehci_hcd 0000:01:0a.2: detected XactErr len 0/8 retry
> 29 [ 6027.085636] ehci_hcd 0000:01:0a.2: detected XactErr len 0/8
> retry 30 [ 6027.085760] ehci_hcd 0000:01:0a.2: detected XactErr len
> 0/8 retry 31 [ 6027.085885] ehci_hcd 0000:01:0a.2: devpath 3 ep0in
> 3strikes [ 6027.136031] ehci_hcd 0000:01:0a.2: GetStatus port:3
> status 001002 0 ACK POWER sig=se0 CSC
> [ 6027.136052] hub 1-0:1.0: unable to enumerate USB device on port 3
> [ 6027.136062] hub 1-0:1.0: state 7 ports 5 chg 0000 evt 0008
>
> Both these fat formatted drives are easily read on several other
> systems running Windows or MAC OS X.
>
> The Gentoo system will read small usb memory sticks up to 16 GB fat
> formatted.
> The Gentoo system will also read a 750 GB NTFS drive without problems.
>
> Is anyone able to point me in the direction to figure out why the fat
> usb drives will not be read by the Gentoo system?
This post
http://permalink.gmane.org/gmane.linux.usb.general/48758
implies possible hardware errors (you seem to have protocol errors on
the USB bus).
Before proceeding further, I'd try a few more tests to narrow down the
circumstances that produce the errors.
What results do you get if you plug the drives into different USB
controllers/ports on the gentoo system?
Can you test if they work with a different kernel version (higher and
lower than the current one in use)?
What kind of drives are these? Are you plugging USB3 drives into USB2
ports for example?
If you are really lucky you might have free space on a drive you can
run mkfs.vfat on and see if that works.
The results of these simple tests stand a good chance of pointing us in
the right direction for the next step.
--
Alan McKinnnon
alan.mckinnon@gmail.com