More USB woes

[Tyler Aviss]

I used to get this when using devices in USB2 mode, but not if I used only
the USB1 modules. I figured it was either the hardware not quite following
spec, or flakiness in the kernel driver.

On 21 Mar 2010 11:52 PM, "Eric Battersby" <gyre-Ja3L+HSX0kI at public.gmane.org> wrote:

On Sun, 21 Mar 2010, Thomas Milne wrote:

> Today I shut down my computer to get the dust out, and w...
...

> Mar 21 13:50:27 node1 kernel: [ 578.617710] sd 2:0:0:0: [sda] Result:
> hostbyte=DID_ERROR driver...
...

> Is there something wrong with my computer? I don't get this with my
> iPod when I plug it in, and ...
I used to get these messages often with USB drives
larger than 500GB (which may explain the iPod), while
the drive was mounted and during writing!
I have an older computer a Dell Lattitude C640 (circa 2002).
What is the vintage of your computer?
How often do you turn your USB drive off?

My advice:
- do not use USB
OR
- disconnect USB cable
- turn off automount
- turn drive on and let it warm up for 45m
- tail -f /var/log/messages in separate window
- while drive not connected
 - connect drive
 - if OK (according to 'messages'), then mount
 - else, disconnect USB, wait 15s

You also might want to consider altering
'/sys/block/sd?/device/max_sectors' to a smaller block size
just before mounting.
After connecting, I set mine to '64'.
I don't know for sure if that helps, but it seems to.


--
Eric B.

--
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