Never mind, turns out that disabling legacy usb support resolved this issue.

-PT

On Sat, Jun 25, 2011 at 9:24 PM, Peter Tenenbaum <
[email protected]> wrote:

> Hello there --
>
> I have a Debian squeeze workstation which uses grub2 as its bootloader.
> The system has 2 hard drives:  the root partition is a software RAID-1 array
> configured with mdadm; the boot partition is non-RAID (ext3).  It also has a
> DVD drive.  The underlying architecture is AMD64, the CPU and mobo are
> Intel.
>
> Ordinarily, booting via grub2 with the configuration above works fine.
> However, when I connect an external hard drive via a back-panel USB port, I
> can't boot -- the boot hangs or freezes or something.
>
> Through use of echo statements, I determined that the problem occurs in the
> following stanza near the top of my grub.cfg file:
>
> insmod raid
> insmod mdraid
> insmod part_msdos
> insmod part_msdos
> insmod ext2
>
>
> The first statement executes correctly, but the second (insmod mdraid) is
> the one which hangs.
>
> Any suggestions for what might be wrong and/or how to correct it?
>
> Thanks in advance for any help you can provide,
> -PT
>
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