Use BiBM to boot from GPT BIOS boot partition

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Re: Use BiBM to boot from GPT BIOS boot partition

Postby Brian K » Sat May 30, 2020 2:07 pm

Mike,

Let's find your sector size. Can you try this from an Admin command prompt. X is the drive letter of a partition. Change X to your drive letter. (you will need a partition with a drive letter on the 4 TB HD)

fsutil fsinfo sectorInfo X:

What are your...

LogicalBytesPerSector :
PhysicalBytesPerSectorForAtomicity :
Brian K
 
Posts: 1810
Joined: Thu Aug 11, 2011 6:11 pm
Location: NSW, Australia

Re: Use BiBM to boot from GPT BIOS boot partition

Postby auryx » Sun May 31, 2020 2:11 am

Hey Brian,

Thanks. The disk is currently taken up by Fedora Linux, so I don't have Microsoft-formatted partition that can easily be assigned a drive letter in Windows.

However, booting into Fedora (by swapping BIOS boot order) and running a fdisk-l gives me the following - does this help? I see both 512 and 4096 byte entries there :D and am not yet knowledgeable enough to know how to interpret that! What do you think?

Disk /dev/sde: 3.65 TiB, 4000787030016 bytes, 7814037168 sectors
Disk model: ST4000DX001-1CE1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 57580CA1-BE2C-4AC5-A6E6-7117F07A1625

Device Start End Sectors Size Type
/dev/sde1 2048 4095 2048 1M BIOS boot
/dev/sde2 4096 2101247 2097152 1G Linux filesystem
/dev/sde3 2101248 7634266111 7632164864 3.6T Linux filesystem
/dev/sde4 7634266112 7781062655 146796544 70G Linux filesystem
/dev/sde5 7781062656 7814021119 32958464 15.7G Linux swap

Cheers,

Mike
auryx
 
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Re: Use BiBM to boot from GPT BIOS boot partition

Postby Brian K » Sun May 31, 2020 2:19 am

Thanks Mike. Sorry, you don't have 4k native sectors so forget my idea about making the disk MBR.
Brian K
 
Posts: 1810
Joined: Thu Aug 11, 2011 6:11 pm
Location: NSW, Australia

Re: Use BiBM to boot from GPT BIOS boot partition

Postby auryx » Sun May 31, 2020 5:51 am

No worries, I still appreciate the idea!

I've been looking into my other idea (i.e. something screwy in my BIOS Boot Partition is stopping BiBM from recognising it as bootable) and reading up on GRUB stuff - going to have a play around later with fdisk etc. and see if I can force it to behave :)

Mike
auryx
 
Posts: 15
Joined: Sat Mar 19, 2016 5:49 am

Re: Use BiBM to boot from GPT BIOS boot partition

Postby grisu70 » Tue Jun 02, 2020 5:57 am

Hi,
this worked for me in one MB (Ausu Z170PRO) , but it did it not worked for a new MB (Asus Z390 Plus Gaming)

1) set the boot order to have my GPT disk as 2nd disk in boot order
2) In BiBm configure the boot item linux partition as follow :
a) boot one partition on disk 0
b) next device ticked

and nothing else
as i told you my old MB work without problem, while the new one works
you may try it


I tried to attach a screen shot.. not sure if i managed

Fabrizio
grisu70
 
Posts: 17
Joined: Thu Feb 09, 2012 12:45 pm

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