BIBM and UEFI/GPT

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Re: BIBM and UEFI/GPT

Postby Bob Coleman » Sun May 14, 2017 2:02 pm

I don't see any CSM.

This is no longer an issue for me, but as an academic exercise and in the spirit of feedback, I tried the conversion again with chgdtype.tbs and it was unsuccessful again.

As I previously reported, my conversion was successful and working.

Without making any BIOS changes, I restored a full disk image from when the disk was GPT. It worked fine.

Still with no BIOS changes, I went through the chgdtype.tbs conversion again. The result: a blank screen with a blinking cursor when trying to boot after the conversion was complete.

Again with no BIOS changes, I restored a full disk image of the previously successfully converted disk. Result: Fully working system.

There seems to be either something wrong with chgdtype.tbs or the way I'm using it.

All my conversions, both successful and unsuccessful have been GPT to MBR. I further converted the successful conversion from MBR to EMBR as part of BIBM installation.
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Re: BIBM and UEFI/GPT

Postby TeraByte Support(PP) » Sun May 14, 2017 10:33 pm

Could you post the specifications of the system, the options you used with chgdtype.tbs, and the partitions on the GPT disk? Maybe it would point to something.
Paul Purviance
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Re: BIBM and UEFI/GPT

Postby Bob Coleman » Mon May 15, 2017 4:59 pm

[attachment=0]Select the Partition to Mount-2017-05-15 19-42-24.jpg[/attachment]For system specifications, see https://support.hp.com/za-en/product/HP ... c05115048/ .

Regarding the partitions on the GPT disk, will the following TBIMount listing of the partitions in a full disk image of the GPT disk suffice? At this point I no longer have the disk in GPT mode though I could restore the image if necessary.

[attachment=0]Select the Partition to Mount-2017-05-15 19-42-24.jpg[/attachment]

I deleted the Backups and WinRE partitions before starting the conversion.

As for options used with chgetype.tbs, I don't recall using any unless you mean the choices offered via GUI when running chgdtype.tbs .

From memory, I selected "Convert a physical disk" then "Delete EFI system partition" and "Delete Microsoft reserved partition". As can be seen from the included image, [attachment=0]Select the Partition to Mount-2017-05-15 19-42-24.jpg[/attachment]that and the previous deletion of Backups and WinRE left four partitions to be converted.

I don't recall making any additional choices.
Attachments
Select the Partition to Mount-2017-05-15 19-42-24.jpg
Select the Partition to Mount-2017-05-15 19-42-24.jpg (31.84 KiB) Viewed 1786 times
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Re: BIBM and UEFI/GPT

Postby TeraByte Support » Tue May 16, 2017 8:10 am

this can be related to compressed files which the next version of tbosdt can
handle, so be interested if next version does it.


"TeraByte Support (PP)" wrote in message news:13788@public.bootitbm...

Could you post the specifications of the system, the options you used with
chgdtype.tbs, and the partitions on the GPT disk? Maybe it would point to
something.

TeraByte Support
 
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Re: BIBM and UEFI/GPT

Postby Bob Coleman » Tue May 16, 2017 11:15 am

OK, I'll try to keep this brief without detailing all the steps I went through to come to the conclusion below.

At this point, suffice it to say that apparently the GPT disk in a "factory reset" state converts correctly while a GPT disk containing a Windows partition that evolved from the "factory reset" state but was significantly updated seems to cause conversion to fail even though chgdtype.tbs reports that it was successful.
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Re: BIBM and UEFI/GPT

Postby DrTeeth » Wed May 17, 2017 1:32 am

On Fri, 12 May 2017 16:26:17 PDT, just as I was about to take a herb,
Bob Coleman disturbed my reverie and wrote:

>I'm nearly resigned to the fact that I'll have to live with GPT and no multi-booting on this system

That is so totally unacceptable to me, that it is stopping me from
upgrading. I really could not do without BIBM as my boot manager.
--
Cheers,

DrT

"If you want to find out what is wrong
with democracy, spend five minutes with
the average voter." - Winston Churchill
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Re: BIBM and UEFI/GPT

Postby Bob Coleman » Wed May 17, 2017 4:10 pm

DrTeeth wrote:
> On Fri, 12 May 2017 16:26:17 PDT, just as I was about to take a herb,
> Bob Coleman disturbed my reverie and wrote:
>
> >I'm nearly resigned to the fact that I'll have to live with GPT and no
> multi-booting on this system
>
> That is so totally unacceptable to me, that it is stopping me from
> upgrading. I really could not do without BIBM as my boot manager.

It's also out of date since I finally got the disk converted.

> --
> Cheers,
>
> DrT
>
> "If you want to find out what is wrong
> with democracy, spend five minutes with
> the average voter." - Winston Churchill
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Re: BIBM and UEFI/GPT

Postby Brian K » Wed May 17, 2017 5:03 pm

DrTeeth wrote:

> That is so totally unacceptable to me, that it is stopping me from
> upgrading. I really could not do without BIBM as my boot manager.
> --

One of the reasons for using GPT disks is the ability to boot an OS on a HD larger than 2 TB. But many of us have our OS on SSDs smaller than 2 TB. If the SSD is a MBR disk we don't have Secure Boot but so what. I'll continue to have my multiple OS on a MBR disk as the advantages (for me) outweigh the disadvantages.
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Re: BIBM and UEFI/GPT

Postby mjnelson99 » Wed May 17, 2017 6:52 pm

Doesn't GPT allow more than 4 partitions that MBR does not?
Mary

On 5/17/2017 7:03 PM, Brian K wrote:
> DrTeeth wrote:
>
>> That is so totally unacceptable to me, that it is stopping me from
>> upgrading. I really could not do without BIBM as my boot manager.
>> --
>
> One of the reasons for using GPT disks is the ability to boot an OS on a HD larger than 2 TB. But many of us have our OS on SSDs smaller than 2 TB. If the SSD is a MBR disk we don't have Secure Boot but so what. I'll continue to have my multiple OS on a MBR disk as the advantages (for me) outweigh the disadvantages.
>
>
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Re: BIBM and UEFI/GPT

Postby Brian K » Wed May 17, 2017 7:32 pm

I should have said EMBR disk, not MBR disk.
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