From: a@b.c   
      
   Arthur Hagen wrote:   
   > Wim Cossement  wrote:   
   >> Hello,   
   >>   
   >> From time to time I don't get some USB hard drives up and running on   
   >> my Gentoo box but they do happen to work fine on a Windows box so I'm   
   >> a bit curious why.   
   >>   
   >> dmesg just gives me this info:   
   >>   
   >> usb 1-4: new high speed USB device using ehci_hcd and address 3   
   >> usb 1-4: configuration #1 chosen from 1 choice   
   >> scsi2 : SCSI emulation for USB Mass Storage devices   
   >> usb-storage: device found at 3   
   >> usb-storage: waiting for device to settle before scanning   
   >> usb 1-4: reset high speed USB device using ehci_hcd and address 3   
   >> usb 1-4: reset high speed USB device using ehci_hcd and address 3   
   >> usb 1-4: reset high speed USB device using ehci_hcd and address 3   
   >> usb 1-4: reset high speed USB device using ehci_hcd and address 3   
   >> usb 1-4: reset high speed USB device using ehci_hcd and address 3   
   >> scsi 2:0:0:0: scsi: Device offlined - not ready after error recovery   
   >> usb-storage: device scan complete   
   >>   
   >> So it seems it being reset but why and by what. And what could I try   
   >> to avoid this in the future?   
   >>   
   >> These are my kernel configuration parameters:   
   >>   
   >> CONFIG_USB_HID=y   
   >> CONFIG_USB_HIDDEV=y   
   >> CONFIG_USB_ARCH_HAS_HCD=y   
   >> CONFIG_USB_ARCH_HAS_OHCI=y   
   >> CONFIG_USB_ARCH_HAS_EHCI=y   
   >> CONFIG_USB=y   
   >> CONFIG_USB_DEVICEFS=y   
   >> CONFIG_USB_EHCI_HCD=y   
   >> CONFIG_USB_UHCI_HCD=y   
   >> CONFIG_USB_PRINTER=y   
   >> CONFIG_USB_STORAGE=y   
   >> CONFIG_USB_MON=y   
   >>   
   >> Thanks,   
   >   
   > Two things:   
   >   
   > 1:  You need SCSI hard drive support set up, since USB uses a pseudo   
   > SCSI device.  Make sure you have enough of the SCSI options enabled to   
   > be able to mount a SCSI drive.   
      
   I know and this is the case.   
      
   > 2:  Are you sure your USB controller is UHCI and not OHCI?   
   > "lspci -v | grep HCI" should give you the answer.   
      
   I have an on-board VIA UHCI controller and an Ali add-on card with an   
   OHCI and EHCI combination.   
      
   It works for most of the time, just sometimes some things don't work as   
   they should...   
      
   Now I've attached 3 devices and they all work fine:   
      
   cat /proc/scsi/scsi   
      
   Attached devices:   
   Host: scsi6 Channel: 00 Id: 00 Lun: 00   
      Vendor: WDC      Model: WD800BEVE-11UYT0 Rev: 01.0   
      Type:   Direct-Access                    ANSI  SCSI revision: 02   
   Host: scsi7 Channel: 00 Id: 00 Lun: 00   
      Vendor:          Model: USB FLASH DRIVE  Rev: 34CH   
      Type:   Direct-Access                    ANSI  SCSI revision: 00   
   Host: scsi8 Channel: 00 Id: 00 Lun: 00   
      Vendor: Maxtor   Model: OneTouch         Rev: 0201   
      Type:   Direct-Access                    ANSI  SCSI revision: 00   
      
   So a 160 GB Maxtor drive, a 80 GB LaCie brick (bus powered but with USB   
   power connector) and a 1 GB SanDisk stick...   
      
   I've done some more testing and it only seems to fail if I don't plug in   
   the optional USB power connector so I guess my crappy Ali card can't   
   give it the juice it needs.   
      
   Is it normal then something is found but not recognised?   
      
   Wimmy   
      
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