On Fri, 8 Sep 2006, Vivek Dharmadhikari wrote: > Hello > > I have problem with a particular type of USB key (3SYSTEM's POCKET DISK) > on my embedded Linux2.6.12 system. From USB protocol analyzer I saw the > USB key device failed to ACK a data packet (size 31 bytes) from USB host > controller and timeout error occurred. USB host controller re-sends the > same data packet 3 times and the USB device does not send anything to > the USB host controller.
Is the failure to ACK the problem you're worried about? > However, this USB storage key works well with PC Linux 2.6.11(fadora > core (2.6.11-1.1369_FC4). > > The kernel log is attached below > > usb 2-1: Product: USB FLASH DISK > usb 2-1: Manufacturer: 3SYSTEM > usb 2-1: SerialNumber: 0307110057580 > scsi0 : SCSI emulation for USB Mass Storage devices > Vendor: 3SYSTEM Model: USB FLASH DISK Rev: 1.00 > Type: Direct-Access ANSI SCSI revision: 02 > SCSI device sda: 512000 512-byte hdwr sectors (262 MB) > sda: Write Protect is off > sda: assuming drive cache: write through > SCSI device sda: 512000 512-byte hdwr sectors (262 MB) > sda: Write Protect is off > sda: assuming drive cache: write through > /dev/scsi/host0/bus0/target0/lun0:<7>usb-storage: queuecommand called > end_request: I/O error, dev sda, sector 0 > Buffer I/O error on device sda, logical block 0 > Buffer I/O error on device sda, logical block 0 > unable to read partition table Or is this I/O error the problem? The two are not necessarily related. 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. Also, it would help to increase the size of your kernel's log buffer. What you posted was missing some information from the beginning. 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 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
