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My Friend's Pen Drive, which was working well very well just few days ago, is not being recognized after getting used by a virus affected machine. Its not on fdisk -l or lsusb However in dmesg I can see the following:

[  977.300013] usb 5-2: new full speed USB device using uhci_hcd and address 2
[  977.420014] usb 5-2: device descriptor read/64, error -71
[  977.644023] usb 5-2: device descriptor read/64, error -71
[  977.860013] usb 5-2: new full speed USB device using uhci_hcd and address 3
[  977.980013] usb 5-2: device descriptor read/64, error -71
[  978.204013] usb 5-2: device descriptor read/64, error -71
[  978.420013] usb 5-2: new full speed USB device using uhci_hcd and address 4
[  978.828015] usb 5-2: device not accepting address 4, error -71
[  978.940015] usb 5-2: new full speed USB device using uhci_hcd and address 5
[  979.348013] usb 5-2: device not accepting address 5, error -71
[  979.348292] hub 5-0:1.0: unable to enumerate USB device on port 2
[ 1017.848015] usb 5-2: new full speed USB device using uhci_hcd and address 6
[ 1017.968012] usb 5-2: device descriptor read/64, error -71
[ 1018.192017] usb 5-2: device descriptor read/64, error -71
[ 1018.408014] usb 5-2: new full speed USB device using uhci_hcd and address 7
[ 1018.528012] usb 5-2: device descriptor read/64, error -71
[ 1018.752023] usb 5-2: device descriptor read/64, error -71
[ 1018.968012] usb 5-2: new full speed USB device using uhci_hcd and address 8
[ 1019.376019] usb 5-2: device not accepting address 8, error -71
[ 1019.488011] usb 5-2: new full speed USB device using uhci_hcd and address 9
[ 1019.896016] usb 5-2: device not accepting address 9, error -71
[ 1019.896308] hub 5-0:1.0: unable to enumerate USB device on port 2
[ 1049.984016] usb 5-1: new full speed USB device using uhci_hcd and address 10
[ 1050.104014] usb 5-1: device descriptor read/64, error -71
[ 1050.328014] usb 5-1: device descriptor read/64, error -71
[ 1050.544014] usb 5-1: new full speed USB device using uhci_hcd and address 11
[ 1050.664018] usb 5-1: device descriptor read/64, error -71
[ 1050.888019] usb 5-1: device descriptor read/64, error -71
[ 1051.104025] usb 5-1: new full speed USB device using uhci_hcd and address 12
[ 1051.512014] usb 5-1: device not accepting address 12, error -71
[ 1051.624101] usb 5-1: new full speed USB device using uhci_hcd and address 13
[ 1052.032014] usb 5-1: device not accepting address 13, error -71
[ 1052.032991] hub 5-0:1.0: unable to enumerate USB device on port 1

What these Errors actually mean and how Can I get this pen drive Back to work ??

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3 Answers

up vote 0 down vote accepted

Either the USB pen is broken and only accepts a specific address (in that case it should work after a reboot, accepting address 1), or its completely managed and the only way to get any data out of it is analysing the flash chip it contains in separate.

In the second case, just throw it away.

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welcome to Super User! this isn't a traditional forum site. we focus on questions and answers here, so there's no need to leave a signature. it's actually preferred not to. – quack quixote May 15 '10 at 13:26
thanks for the note, I won't be doing that again. – jneves May 15 '10 at 18:34
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up vote 0 down vote

When you say back to work do you want to recover the data, or just wipe the disk?

have tried it in widows, to see if it is visible there?

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Ya I've tried it in Windows. But It says USB Device not Recognized. There is not much Important Data on it. and I want to repair and format it and start using again. However If thats not possible I want to go deeper and do as much as possible. – user36582 May 9 '10 at 13:15
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up vote 0 down vote

Did you try running chkdsk on it? On Windows of course :) Or you maybe able to format it through Windows

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