usb hard disk not getting recognized

[Abhishek Dixit]

On Wed, Jan 9, 2013 at 10:25 PM, Oliver Grawert <ogra at ubuntu.com> wrote:

> hi,
> Am Mittwoch, den 09.01.2013, 21:54 +0530 schrieb Abhishek Dixit:
> >
> > yes I did exactly the same
> > when the disk was not inserted to USB slot
> > cp /var/log/dmesg /home/abhi/dmesg_without_dell_usb
> > and after I inserted the USB disk (1 TB)
> > cp /var/log/dmesg /home/abhi/dmesg_with_dell_usb
> >
> >
> > and diff
> >  /home/abhi/dmesg_with_dell_usb /home/abhi/dmesg_without_dell_usb
> > I got no output on screen so it means the kernel did not actually
> > noticed the disk at all.
> >
> this cant work, /var/log/dmesg only contains boot information, it does
> not get updated after booting. use the dmesg command instead, that reads
> the actual kernel ring buffer and will give you current events.
>
> Ok thanks for clarifying this yes you people are right there is some
> output to dmesg when USB

 hard disk Dell 1 TB is plugged in and it is following
[   69.540224] usb 2-1: new high speed USB device number 2 using ehci_hcd
[   69.674505] scsi7 : uas
[   69.675815] scsi 7:0:0:0: Direct-Access     Dell     USB Portable HDD
040D PQ: 0 ANSI: 6

I am on Ubuntu 11.10
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