On Thu, 31 Aug 2006, Adam Rosi-Kessel wrote: > Using 2.6.17.11 on a Debian Sarge system. > > I have a brand new external USB 2.0 250GB hard drive. It shows up like > this: > > Vendor: WDC WD25 Model: WD-WMAL71747150 Rev: 2D08 > Type: Direct-Access ANSI SCSI revision: > SCSI device sda: 488397168 512-byte hdwr sectors (250059 MB) > sda: Write Protect is off > sda: Mode Sense: 00 38 00 00 > sda: assuming drive cache: write through > SCSI device sda: 488397168 512-byte hdwr sectors (250059 MB) > sda: Write Protect is off > sda: Mode Sense: 00 38 00 00 > sda: assuming drive cache: write through > sda: sda1 > sd 0:0:0:0: Attached scsi disk sda > > It mounts fine and works for a while. I've run badblocks on the drive > several times with no bad sectors detected. > > After a day or two of use (attempting to do a large rsync backup nicely > so it doesn't interfere with server operations), I get the following > type failures: > > usb 4-1: reset high speed USB device using ehci_hcd and address 2 > usb 4-1: device descriptor read/64, error -71 > usb 4-1: device descriptor read/64, error -71
> etc.. After that, it is no longer possible to read or write to the > mountpoint. I also can't remount the drive -- even restarting hotplug it > appears that a full reboot is necessary. Does cycling the power on the disk drive (without rebooting) help? > Any ideas how to isolate the problem? I can't figure out if it is a > hardware or software problem. I did a large transfer to and from this > drive on another system without problem. The results above on the system > in question seem reproducible, at least inasmuch as they keep happening > after a couple of days of use. Your description makes it sound like a hardware or firmware problem in the drive or its USB interface. Or just possibly a marginal hardware compatibility problem between the USB interface in the drive and the USB controller in your computer (or even the USB cable). 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-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
