On Mon, 11 Sep 2006, Vivek Dharmadhikari wrote: > Hello Alan > > > Is the failure to ACK the problem you're worried about? > > Yes and the other issue(I/O error) as well. The real problem is that > when we use this USB stick with out host controller, the driver takes > long time to report "Attached scsi removable disk sda at scsi0, channel > 0, id 0, lun 0" line. Similarly the driver takes long time when we try > to mount the file system and contents of mounted directory can not be > accessed. > > > To find out what's happening, you should compare a kernel log > > from the device and a log from a PC running the same version > > of the Linux kernel, that is, vanilla 2.6.12 and not Fedora's 2.6.11. > > I don't have a PC running 2.6.12. However I will try. > > > Also, it would help to increase the size of your kernel's log > > buffer. > > I am reposting the kernel log below. The log is long because I did not > edit it. Please let me know if more info is required.
The drive's firmware fails to respond to MODE SENSE commands. The same thing should happen on the PC. It would be possible to prevent those commands from being sent by adding an entry to the blacklist table, if you want. The drive also has a problem with a READ command and fails to recover from it properly. You should try using 2.6.13 or later (the later the better) because in those kernels the error recovery in usb-storage is much improved. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
