On Tue, 2011-07-05 at 17:01 +0800, 某因幡 wrote: > Hi, > I've tried to copy some different files to an USB flash disk and an USB HDD > and tried different USB hubs. > After a while the system gets very slow, switching between windows can take > quite a while. The copying speed is slow, too(only several MB/s to an empty > USB HDD). > The machine is not old, just bought it this year. And on the same machine > the same problem is not seen on Ubuntu 10.04 and Windows 7. > Any ideas? Flash and HDD are two different cases. Flash drives can become slow because of their internal architecture, fragmentation, wear leveling etc. (lots of info on this via Google). I use an 8GB pen drive a lot and every so often find it useful to reformat it completely, which seems to help. This is a VFAT drive since it has to be compatible with another (non-Linux) system. In the HDD case, you may just have a slow USB port. Check if it's USB-1, USB-2 or USB-3 (unlikely at the moment). And remember that USB doesn't do DMA, so writing large amounts of data means soaking up CPU time. poc -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
