On Sun, 27 Nov 2011 15:08:10 -0500 sean <tech.j...@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.mckin...@gmail.com
