[Bug 1295498] Re: [SRU] bootable disk isn't found for instance with 8 disks

[James Page]

1.7.3 requires the following pick from the 1.7.3-stable branch:

http://code.coreboot.org/p/seabios/source/commit/84c97cc0b3efd9d521a22d5c1f528902bd670c15/

** Description changed:

- instances with more than 8 data volumes failed to boot and stuck after
- the POST screen, with the message "no bootable device".
+ [Impact]
+ Its not possible to boot qemu-kvm instances in OpenStack nova with more that 8 disks attached to the instance.
+ 
+ [Test Case]
+ Create an instance in nova, create and attach 8 cinder volumes to instance, reboot - instance fails to find boot disk.
+ 
+ [Regression Potential] 
+ Minimal, this fix is in trusty (1.7.4) and is part of the 1.7.3.1 release of seabios.

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Title:
  [SRU] bootable disk isn't found for instance with 8 disks

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