Re: Getting "error communication with USB Mass Storage device" when running ls (usb0) (or ls (usb0)/)

[Kevin Wilson]

Hi,
Please ignore my question, the USB dongle was not in place.
Kevin

On Sun, Mar 22, 2015 at 9:54 AM, Kevin Wilson <address@hidden> wrote:
> Hi, grub gurus,
>
> I have a CentOS release 6.2 machine with  GNU GRUB  version 2.02~beta2
> I have a Kingston USB dongle plugged in into it
> When I boot, I press "C" from the grub menu to start in console mode, and
> I reach the grub prompt.
> From the grub prompt, I run ls, and I get:
>
> (cbfsdisk) (proc) (ahci0) (ahci0,msdos2) (ahci0,msdos1) (usb0) (memdisk)
>
> I can run (ahci0,msdos1) succesfully to read the
>  /boot partition on the machine ( /boot is mounted on /dev/sdb1, its
> type is ext4)
>
> However, when I run ls (usb0) (or ls (usb0)/) I get:
> error: error communication with USB Mass Storage device.
> On the USB disk I have an ext4 partition (/dev/sda1), and I can mount
> this USB partition
> succesfully on the CentOs machine.
>
> The "communication with USB Mass Storage device" appears in both
> cases, when the USB dongle is mounter
> and when it is not mounted.
> Any idea what is the reason for this ?
>
> Regards,
> Kevin