Thanks for the response.
My problem is this is not reproducible (once in 2-3 months). I noticed this device (I have 2 like this different make) stopped recording and dmesg has lots of error like below. Fsck.ext3 does not fix it. Any suggestions what I could infer from these messages. a) Periodic reset high speed USB device --------------Syslog ------------------------------- 4 16:21:47 (none) kernel: usb 1-1: reset high speed USB device using musb_hdrc and address 2 Jun 4 17:44:32 (none) kernel: usb 1-1: reset high speed USB device using musb_hdrc and address 2 Jun 4 19:07:17 (none) kernel: usb 1-1: reset high speed USB device using musb_hdrc and address 2 b) sd 0:0:0:0: [sda] Unhandled sense code ----------------dmesg--------------------------------------------------- ------------- Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1310951 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835111 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835143 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835159 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835183 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1914463 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1914543 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1914623 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2097223 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2097239 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2458087 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2472839 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2472903 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 3407935 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 3409287 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 3670079 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 3671591 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 63 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 71 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 262207 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 262215 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 786495 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 786503 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1310783 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1310791 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835071 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 1835079 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2359359 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 2359367 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 4207 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 4207 __ratelimit: 72 callbacks suppressed Buffer I/O error on device sda1, logical block 1036 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 1037 lost page write due to I/O error on sda1 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 63 Buffer I/O error on device sda1, logical block 0 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 1 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 2 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 3 lost page write due to I/O error on sda1 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 262223 Buffer I/O error on device sda1, logical block 65540 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 65541 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 65542 lost page write due to I/O error on sda1 Buffer I/O error on device sda1, logical block 65543 lost page write due to I/O error on sda1 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 end_request: I/O error, dev sda, sector 262535 sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=0x00 driverbyte=0x08 sd 0:0:0:0: [sda] Sense Key : 0x7 [current] sd 0:0:0:0: [sda] ASC=0x27 ASCQ=0x0 From: Steve Poulsen [mailto:[email protected]] Sent: Monday, June 07, 2010 10:16 AM To: Alok Kumar Cc: Stephen Berry; [email protected]; [email protected] Subject: Re: usb 1-1: device descriptor read/64, error -110 Can you measure the VBUS on a reboot and see if it is getting disabled? On 06/07/2010 08:41 AM, Alok Kumar wrote: Appreciate your responses. When USB drive was in not detected state, I restarted the unit, a fresh power up did not fix the issue. However when we pulled out the USB key device and inserted again, it was detected, enumerated, mounted. Subsequent power up, did not show any issues (at least for time being) The area, I don't understand how a re-inserting USB pen drive worked successfully(detected, enumerated, mounted) , but power reset to board did not fix the issue. Any thoughts what I can do in this situation ? Thanks Alok From: Stephen Berry [mailto:[email protected]] Sent: Friday, June 04, 2010 10:07 PM To: Alok Kumar Cc: [email protected] Subject: Re: usb 1-1: device descriptor read/64, error -110 It looks like the device descriptor wasn't read correctly. Without that the kernel can't attach the device. Did you try removing it and hot-plugging to see if it works? If a USB device doesn't respond to configuration requests appropriately, then it is usually because it is : a - damaged b - the hardware (pen drive) has a power issue c - firmware is too slow on the device to respond. Try a new pen drive. You can certainly detect that a device you expect isn't mounted, not sure how to tell udev to try to reconfigure it again after it failed the first time around... Steve On 6/4/2010 4:16 PM, Alok Kumar wrote: Correction Error number is -110 (timeout) From: Alok Kumar Sent: Friday, June 04, 2010 4:25 PM To: '[email protected]' Subject: usb 1-1: device descriptor read/64, error -11 Hi, I am using Davinci 6446 with git tree kernel 2.6.30. We use USB drive (pen drive) to collect the data periodically. Sometimes (once in 3-4 months) , after reboot an earlier working USB drive is not recognized (no /dev/sda1 etc) and I see following errors and USB is was not detected. kernel: usb 1-1: new high speed USB device using musb_hdrc and address 2 kernel: Initializing USB Mass Storage driver... kernel: usbcore: registered new interface driver usb-storage kernel: USB Mass Storage support registered. kernel: musb_h_ep0_irq 1067: no URB for end 0 kernel: usb 1-1: device descriptor read/64, error -110 I see some comments in musb/musb_host.c for 'no URB for end 0', saying this should never happen. My question is how to fix this error. What kind of recovery mechanism , I can put to auto detect it and fix it. Any help will be greatly appreciated. Thanks Alok NOTICE: The information contained in this email and any document attached hereto is intended only for the named recipient(s). 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