Avatar of sunhux
sunhux
 asked on

How to convert a FAT32 & HFS partition to a GPT partition?

Is there any freeware / tool running on Win XP that could convert an FAT32
& a HFS partition to a GPT (Global Partition Table) filesystem?  Pls provide
 the link / url.

Reason is I formatted my external USB HDD to a mix of
FAT32 & HFS partition to take "Disk Utility" backup but it
complained the destination (ie the USB HDD) is not a
GPT.
StorageStorage HardwareApple HardwareApple OS

Avatar of undefined
Last Comment
ArneLovius

8/22/2022 - Mon
SOLUTION
strung

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
SOLUTION
strung

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
sunhux

ASKER
Thanks chaps; why didn't I think of doing it on the Macbook.

The Macbook belongs to my kid & I never get to use the Macbook
& I'm a dummy when it comes to Apple products.

  I only uses Windows laptops.
sunhux

ASKER
Need more help:

From the Macbook (Retina model) Disk Utility, when I select
the HFS or FAT partitions & then click "Erase" tab,
followed by "Format: " field, it only give options 1, 2, 5, 6 :

1. Mac OS Extended (journaled)
2. Mac OS Extended (journaled, Encrypted)
3. Mac OS Extended (Case-sensitive, journaled)
4. Mac OS Extended (Case-sensitive, journaled, Encrypted)
5. MS-DOS (FAT) : I suppose this is FAT32 ?
6. Ex-FAT

When I select the entire USB HDD, it gave all the above
6 options.  However, I don't see any GPT (or GUID Partition
Table) ?  Am I missing something?

I recall I've seen it in Win 2008 Enterprise R2
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
sunhux

ASKER
Ok, tried that & under Options button, there's GUID.
However, when I click "Apply" it says the entire USB
HDD (ie all the four partitions) will be erased.

is there anyway to convert only one partition to GPT
/GUID without affecting the remaining 3 partitions?
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck
sunhux

ASKER
ie have a mix of GPT partition as well as Mac OSX HFS as well
as FAT32 partitions on that USB HDD
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
sunhux

ASKER
gptgen is great & free as well.

Care to share with me the exact syntax & some examples on how
to use gptgen as it's rather cryptic.  After that I'll close this thread

D:\gpt\gptgen-1.1>gptgen.exe
gptgen.exe: Partition table converter v1.1

Usage: gptgen.exe [<arguments>] <device_path>
where device_path is the full path to the device file,
e.g.\\.\physicaldrive0.

Available arguments (no "-wm"-style argument combining support):
-b <file>, --backup <file>: write a backup of the original MBR to <file>
-c nnn, --count nnn: build a GPT containing nnn entries (default=128)
-h, --help, --usage: display this help message
-k, --keep-going: don't ask user if a boot partition is found
-m, --keepmbr: keep the existing MBR, don't write a protective MBR
-w, --write: write directly to the disk, not to separate files
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
sunhux

ASKER
On my Win XP Professional laptop (32 bit), I don't see the USB
HDD (which is currently in GPT format).

But on a Win 2008 Enterprise R2, I saw it:

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          298 GB   228 GB
  Disk 1    Online          931 GB   508 MB        *

DISKPART> select disk 1
Disk 1 is now the selected disk.
DISKPARt> exit

Somehow, still run into difficulties:

C:\gptgen11\gptgen-1.1>gptgen.exe \\.\physicaldrive2
gptgen.exe: Partition table converter v1.1

Unable to auto-determine the block size of the disk.
Please enter the the block size by hand to continue.
>quit
Block read failed, check permissions!

Next I try with physicaldrive1 :

C:\gptgen11\gptgen-1.1>gptgen.exe \\.\physicaldrive1
gptgen.exe: Partition table converter v1.1

Not enough space at the beginning of the disk (need at least34 sectors before
the start of the first partition).
Re-partition the disk to meet this requirement, and run this utility again.

Not enough space at the end of the disk (need at least
33 sectors afterthe end of the last partition).
Re-partition the disk to meet this requirement, and run this utility again.

C:\gptgen11\gptgen-1.1>
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
ASKER CERTIFIED SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.
SOLUTION
Log in to continue reading
Log In
Sign up - Free for 7 days
Get an unlimited membership to EE for less than $4 a week.
Unlimited question asking, solutions, articles and more.