/home/bill/bin/USB memory slow file transfers.txt
www.BillHowell.ca   26Feb2017 initial


USB memory stick files transfers are slow



http://askubuntu.com/questions/122113/copy-to-usb-memory-stick-really-slow
Copy to USB memory stick really slow?

Found the fix all i did was unmount, remove drive, and run sudo modprobe ehci_hcd in the Terminal. Insert drive and agian sudo modprobe ehci_hcd when I put the drive in and wow 20/mbs thought i would share. Hope I dont have to do it every time... but it's not to hard...
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/177235 says they fixed the bug.
edited May 23 '12 at 11:37, Marco Ceppi♦
answered May 4 '12 at 7:03, Dj Radio

Just umount the device if it is automounted already, and manually mount it to /mnt/foldername.
In my case,
umount /media/usb0
mount /dev/sdb1 /mnt/sam
After that it is coping very fast.
answered Dec 10 '14 at 17:13, msnfreaky

Somewhere a comment on blacklisting...  ???

https://odd.blog/2009/05/07/ubuntu-linux-slow-external-usb-drive/
Author: Donncha
To cut a long story short, after a few searches I found bug 66115 where the same problem is described. Unfortunately the ticket has since been closed but the work around discovered by Jean Pierre Rupp works for me too. I haven’t modified any files in /etc/ but unloading ehci_hcd and uhci_hcd and reloading in the correct order worked for me:
    rmmod ehci_hcd
    rmmod uhci_hcd
    modprobe ehci_hcd
    modprobe uhci_hcd
Now I get a very respectable 15-20MB/s when using rsync to transfer files from my internal drive and reads are super fast

>> I tried this!
NYET!!   Too dangerous!! :
$ sudo rmmod ehci_hcd
[sudo] password for bill: 
Error: Module ehci_hcd is in use by: ehci_pci


Screw it - Use my IOMEGA drive!!!??



# enddoc