On 1/17/06, Z F <[EMAIL PROTECTED]> wrote: > After that, and searching on the web, I saw reports that connecting a > drive via powered USB hub helps. What it told me is that powered hub > supplies more power than the host controller. Since I do not have a hub, > but the PCI card had this power connector, I finally connected the power > to it. > > Interestingly enough, the drive started to work perfectly in USB1.1 > mode. In USB 2.0 mode, it still crashes on large copies, but now I can copy > about 1G file (compared to 100M before). From windows, on the same > system, the drive works. > > This exact same drive works perfectly on another Linux system (which > has different hardware). Putting this all together, I have > concluded that :"It _appears_ to me, there are problems with the power" >
I will tend to agree with you. I have an external 2.5 inch hard disk (20G IBM). It is USB 2.0 and it works fine in USB 1.1 in my work PC (Pentium 3 1GHz) under Windows. It never worked reliably with USB 2 on all my home PCs (a Dell 600M notebook and two desktops). It could work for a while on the desktops but it will crash very soon. Later I changed the box which use an extra USB port to supply the power (it needs two USB ports) and now all problems are solved. I find that most of the new 2.5" box with two USB connections work nicely. I have another sync-charger cable for an old PDA (HP Jonarda 565) and it refuse to work on the Dell 600M as well because of power problem. Regards, Xiaofan ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642 _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
