Comment 75 for bug 61235

Had the same problem with 2.6.20-16 using the onboard nforce2 usb controller and a pair of Lacie 500Gb USB2.0 drives. I'm using software raid1 on these drives.

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Sep 4 22:50:01 dita kernel: [211049.946541] usb 3-1: reset high speed USB device using ehci_hcd and address 4
Sep 4 22:50:31 dita kernel: [211080.160296] usb 3-1: reset high speed USB device using ehci_hcd and address 4
Sep 4 22:50:42 dita kernel: [211090.394942] usb 3-1: reset high speed USB device using ehci_hcd and address 4
Sep 4 22:50:42 dita kernel: [211091.079875] usb 3-1: USB disconnect, address 4
Sep 4 22:50:42 dita kernel: [211091.080022] sd 2:0:0:0: scsi: Device offlined - not ready after error recovery
Sep 4 22:50:42 dita kernel: [211091.080037] sd 2:0:0:0: SCSI error: return code = 0x00050000
Sep 4 22:50:42 dita kernel: [211091.080041] end_request: I/O error, dev sdb, sector 656223879
Sep 4 22:50:42 dita kernel: [211091.080048] raid1: sdb1: rescheduling sector 656223816
Sep 4 22:50:42 dita kernel: [211091.080061] sd 2:0:0:0: rejecting I/O to offline device
Sep 4 22:50:42 dita kernel: [211091.080069] md: super_written gets error=-5, uptodate=0
Sep 4 22:50:42 dita kernel: [211091.080075] raid1: Disk failure on sdb1, disabling device.
...

This happened randomly - usually atleast once a day. Well anyway, updated to 2.6.22-10 from gutsy and *knock knock* everything has been working properly atleast for few days.