Archive

Posts Tagged ‘usb’

“reset high speed USB device using ehci_hcd and address 3”, your syslog and what fixed it for me

August 26, 2010 15 comments

If you use external USB drives (be it SD-Cards, Hard Disk or Thumbs) and your drive(s) seem to hang from time to time while spitting out¬†“[...] reset high speed USB device using ehci_hcd and address 3 [...]” in your syslogs, the following fixed it for me.

My one little 320GB 2.5″ external Western Digital USB hard drive had this issue, while the big ones didn’t – seems like it is somehow related to being powered by the bus itself or using a dedicated power supply. Anyway, the drive seemed to hang on large file transactions (like copying a big file) and then the kernel had to reset it, announcing it via the syslog. Very annoying, especially because SMB transfers always got interrupted and went totally ¬†foobar. The fix was quite simple. max_sectors for the drive was set to its default 240 value, which the drive choked on for no apparent reason whatsoever. Issuing a quick
echo 128 > /sys/block/sdc/device/max_sectors
fixed it. YMMV. Of course replace sdc with the actual node of your drive.

Advertisements
Categories: linux, rants, uncategorized, unix Tags: , , , ,
%d bloggers like this: