External USB hard disk not recognised after a power failure during operation

[Rajnish Dahiya]

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
[ 335.779414] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 335.780398] e100: eth0 NIC Link is Up 10 Mbps Full Duplex
[ 335.781854] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 338.116126] usb 2-1: device descriptor read/64, error -110
[ 353.332130] usb 2-1: device descriptor read/64, error -110
[ 353.548123] usb 2-1: new full speed USB device using uhci_hcd and
address 4
[ 358.569288] usb 2-1: device descriptor read/8, error -110
[ 363.689282] usb 2-1: device descriptor read/8, error -110
[ 363.904192] usb 2-1: new full speed USB device using uhci_hcd and
address 5
[ 368.926285] usb 2-1: device descriptor read/8, error -110
[ 374.045330] usb 2-1: device descriptor read/8, error -110
[ 374.148155] hub 2-0:1.0: unable to enumerate USB device on port 1
[ 885.124101] usb 2-1: new full speed USB device using uhci_hcd and
address 6
[ 899.052171] hub 2-0:1.0: unable to enumerate USB device on port 1
[ 907.060161] usb 1-1: new high speed USB device using ehci_hcd and
address 16
[ 922.172143] usb 1-1: device descriptor read/64, error -110
[ 937.388120] usb 1-1: device descriptor read/64, error -110
[ 937.604146] usb 1-1: new high speed USB device using ehci_hcd and
address 17
[ 942.736400] hub 1-0:1.0: unable to enumerate USB device on port 1
[ 994.604132] usb 1-1: new high speed USB device using ehci_hcd and
address 18
[ 1009.720155] usb 1-1: device descriptor read/64, error -110
[ 1024.936085] usb 1-1: device descriptor read/64, error -110
[ 1025.152147] usb 1-1: new high speed USB device using ehci_hcd and
address 19
[ 1040.264165] usb 1-1: device descriptor read/64, error -110
[ 1044.568405] hub 1-0:1.0: unable to enumerate USB device on port 1
[ 1295.240248] usb 1-1: new high speed USB device using ehci_hcd and
address 20

*****************************************

If somebody has any idea where to go from here, please send your
suggestions.

[Sharad Birmiwal]

> [ 1009.720155] usb 1-1: device descriptor read/64, error -110
> [ 1024.936085] usb 1-1: device descriptor read/64, error -110
> [ 1025.152147] usb 1-1: new high speed USB device using ehci_hcd and
> address 19
> [ 1040.264165] usb 1-1: device descriptor read/64, error -110
> [ 1044.568405] hub 1-0:1.0: unable to enumerate USB device on port 1
> [ 1295.240248] usb 1-1: new high speed USB device using ehci_hcd and
> address 20

These error indicate a hardware problem. Check if the cabling has come
loose. Switch off the external hard drive (if it runs on external
power). Start ubuntu, power up the hard drive, and then connect it to
your computer.

Can't think of anything else.

SB

[Rajnish Dahiya]

I tried the same thing as u said, and woooooooooooooo
My HD is working fine now !
thanks for quick reply.

[narendra sisodiya]

On Mon, May 31, 2010 at 11:41 PM, Sharad Birmiwal <sharadb...@gmail.com> wrote:

> [ 1009.720155] usb 1-1: device descriptor read/64, error -110
> [ 1024.936085] usb 1-1: device descriptor read/64, error -110
> [ 1025.152147] usb 1-1: new high speed USB device using ehci_hcd and
> address 19
> [ 1040.264165] usb 1-1: device descriptor read/64, error -110
> [ 1044.568405] hub 1-0:1.0: unable to enumerate USB device on port 1
> [ 1295.240248] usb 1-1: new high speed USB device using ehci_hcd and
> address 20

These error indicate a hardware problem. 

Hardware problem. I do not think, you will be able to use it now. I have similar bad experience.

 

--
┌─────────────────────────┐
│    Narendra Sisodiya
│    http://narendrasisodiya.com
└─────────────────────────┘

[narendra sisodiya]

Please do not top post.

Good to see your HD is working. May be you need to give some chocolates to SB.

but take its backup. One of my drive worked after some serious error. I took backup and after that it again went to same error.

[Nilesh Govindarajan]

Better take out all the data from it and format it afresh. It will
eliminate any FS errors.

--
Nilesh Govindarajan
Facebook: nilesh.gr
Twitter: nileshgr
Website: www.itech7.com

[Sharad Birmiwal]

On Mon, May 31, 2010 at 9:24 PM, Nilesh Govindarajan <li...@itech7.com> wrote:
> Better take out all the data from it and format it afresh. It will
> eliminate any FS errors.
>

The errors in the log message didn't indicate any fs (filesystem)
errors. If there are any fs errors, they can be fixed via e2fsck (if
they are ext2 or ext3 fs). If it is FAT/NTFS, I am sure there are
appropriate tools.

This mentality of copying data, reformatting things and moving data
back sounds like reinstalling windows if things start failing :)

Correct me if I am wrong but if there are file-system errors, you
won't be able to copy data from those "sections" of HDD even if you
tried to copy it unless you fix the filesystem errors? That's just
what I think "should" be the case.

SB