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From: Venkata Subbarao <rao.subba.venkata@gmail.com>
Subject: Switching to another boot device on failure
Date: Tue, 18 Nov 2014 10:51:00 +0000 (UTC)
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Hi All,

I am working on a task on XUbuntu OS in which due to any reason if booting
fails I would like to switch to another boot device by zeroing the MBR of
current boot disk. Is this possible ?

For example instead of showing following prompt, I would like to zero out
the MBR so that the BIOS can select next boot device upon reset.

error: no such partition
grub rescue>


Thanks in advance,
Venkata Subbarao