[ubuntu-in] External USB hard disk not recognised after a power failure during operation

[Ritesh Sinha]

On Mon, May 31, 2010 at 10:37 PM, Alok Singh Mahor <alokmahor at gmail.com> wrote:
>
>
> I am using Ubuntu 10.04 and win XP.
>
> While I was playing some songs from my HD on windows  suddent power
> got disconnected from my HD. When I plug it again it was not
> recognised(on windows). Actually windows even doesn't boot while HD is
> plugged in.
>
> Then I came to Ubuntu(usb still plugged in) but again Ubuntu was
> taking a lot of time for booting, then I unplugged HD and system
> booted normally. Then I plugged HD again but it was not recognized.
>
> After that I tried few commands:
>
> lsusb:
> It doesn't give any output when HD is plugged in.
>
> When plugged out lsusb gives normal output.
>
> Here are the last few lines of the command 'dmesg' which I think is
> showing some errors
> ****************************************
> [  271.592137] usb 1-1: new high speed USB device using ehci_hcd and
> address 14
> [  276.612302] usb 1-1: device descriptor read/8, error -110
> [  281.732305] usb 1-1: device descriptor read/8, error -110
> [  281.948161] usb 1-1: new high speed USB device using ehci_hcd and
> address 15
> [  286.968302] usb 1-1: device descriptor read/8, error -110
> [  292.088306] usb 1-1: device descriptor read/8, error -110
> [  292.192166] hub 1-0:1.0: unable to enumerate USB device on port 1
> [  292.460163] usb 2-1: new full speed USB device using uhci_hcd and
> address 2
> [  307.572143] usb 2-1: device descriptor read/64, error -110
> [  322.788086] usb 2-1: device descriptor read/64, error -110
> [  323.004171] usb 2-1: new full speed USB device using uhci_hcd and
> address 3
<snip>

This is most probably a hardware fault  and I doubt you can do
anything with Ubuntu to fix it. If it's a HDD with USB casing you
could try to connect the drive directly to your system (internally)
and try to recover the data using dd_rescue or similar tools.

In any case, it's best that you make arrangements to get it replaced.

> *****************************************
>
> If somebody has any idea where to go from here, please send your
> suggestions.
>
>
>
>
>
> --
> Alok Singh Mahor
> CSE, IIT Delhi
> www.alokmahor.tk
>
> Join the next generation of computing, Open Source, and Linux/GNU!
>
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>
>



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