On Tue, 8 May 2007, Fredrik Öberg wrote: > Dear all, > I have a external USB2 HDD, attatched to a USB2 PCI card. Copying data > TO the external HDD is no problem, according to Krusader it runs with > 5-6 MB/s. However, copying FROM the external HDD causes the HDD to > disconnect. > > My setup: There is a USB2 PCI card: > > /home/effo> lspci -v | grep HCI > 02:00.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 63) > (prog-if 20 [EHCI]) > > And there is a USB2 device: > > cat /proc/bus/usb/devices > T: Bus=05 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 9 Spd=480 MxCh= 0 > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=067b ProdID=2507 Rev= 1.00 > S: Manufacturer=Prolific Technology Inc. > S: Product=Mass Storage Device > S: SerialNumber=0 > C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage > E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms > E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms > > When using Krusader to copy from the external HDD, this show up in the log: > > May 7 23:00:32 siduxbox kernel: usb 5-1: reset high speed USB device > using ehci_hcd and address 9 > May 7 23:00:35 siduxbox last message repeated 3 times > May 7 23:00:35 siduxbox kernel: sd 7:0:0:0: SCSI error: return code = > 0x00070000 > May 7 23:00:35 siduxbox kernel: end_request: I/O error, dev sdb, > sector 606266230
> If I use e2fsck after this, the disk is reported as clean. > > If I unload ehci-hcd there are no problems reading from the HDD but > then its so slow. > > Any ideas of what I do wrong? Sometimes these problems are caused by poor-quality USB data connections. Try using different USB cables or a different port. Do the errors occur immediately when you try to read from the HDD, or does it work okay for a while first? Alan stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
