Strange booting problem

[jd1008]

On 06/30/2015 05:10 PM, Chris Murphy wrote:
> On Tue, Jun 30, 2015 at 5:02 PM, Gordon Messmer
> <gordon.messmer at gmail.com> wrote:
>> On 06/30/2015 03:41 PM, jd1008 wrote:
>>> So, it begs the question:
>>
>> (that's not what "begs the question" means)
> Yes. It's an accusation.
>
>>> Can I create a disk with msdos partitioning scheme,
>>> none of the partitions marked as bootable, and have bios
>>> quickly skip over it to the next device in the boot sequence?
>>
>> So far it looks like the answer is "no" or "it depends on your BIOS."
>>
>> Both SeaBIOS and your Dell BIOS, based on what we've seen, will attempt to
>> use the boot sector of a disk with a valid MBR, even when the boot sector is
>> all zeros.  That's consistent with all of the documentation I can find.
>> It's possible that other BIOS might skip an all-zero boot sector, but we
>> don't have any documentation of which systems behave that way.
> That seems to be true.
>
>
>> However, also based on testing, it seems that if you used GPT for your
>> partitions, then BIOS would skip over the drive during the boot process.
> No because every GPT creator also creates a PMBR which includes the
> MBR boot signature that you're telling us causes (some) BIOS's to use
> the entire MBR and then hang if it has nowhere to go.
>
>> So, maybe that's a solution?  The only reasons I can think of to use MBR are
>> a) you have an operating system that can't read GPT and b) you need to boot
>> from the drive under BIOS.  I don't think either of those apply to you.
> If you have such a BIOS, the work around is to not partition it either
> MBR or GPT. If it needs partitioning, use LVM on the whole block
> device. It has a signature the BIOS won't know about.
>
OMG!!!
LVM!!!
The other OS will most certainly NOT be able to make use
of that drive :) :)