Messages in this thread | | | Date | Sat, 09 Dec 2006 17:11:16 +1100 | From | Ben Nizette <> | Subject | Re: single bit errors on files stored on USB-HDDs via USB2/usb_storage |
| |
>>> Also, you mentioned that the corruption occurs systematically on certain >>> byte patterns. Therefore it's certainly not related to the cables. >> It'd guess that too, but who can that say for sure. :-| > > You may have a bit pattern that stresses the controllers and suddenly > a marginal cable may matter.
The errors occur in strings of 0xFFs. From the USB standard:
a “1” is represented by no change in level and a “0” is represented by a change in level
so this error-infested bytes are effectively long, quiet times on the wire. I would have thought this would be the _least_ stressful time for the controllers but maybe they are also more susceptible to noise during this period.
Regards, Ben - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |