remove partisi gpt

Removing GPT information from a drive
=====================================

Linux/Unix:
Method #1:
1. Press CTRL-ALT-F2 or F3.
2. Type "parted /dev/<devicename>", usually "parted /dev/sda".
3. Once inside parted type "mktable":
  -> Table type: msdos
  -> Destroy data: yes
  -> quit
4. GPT should now be removed
Method #2:
1. fdisk -s /dev/<devicename> --- This gets the blocksize of the device.
  Make the last five digits of this number zeros. Example: fdisk -s /dev/sda
  Will show an error about GPT, and then the block size: 39078144
  Change to 39000000 which equals our blockcount
2. dd if=/dev/zero of=/dev/devicename bs=1k seek=blockcount
3. dd if=/dev/zero of=/dev/devicename bs=1k count=20

Method #3:
1. Press CTRL-ALT-F2 or F3.
2. Type: "dd if=/dev/<devicename" of=/dev/zero bs=4k"
3. When done, continue with install.

Windows Vista/7/2008/BartPE/WinPE/WinXP Live:
Method #1:
1. Boot up to installation DVD/CD.
2. Click install but don't follow through.
3. Press SHIFT-F10 to bring up console.
4. Type "diskpart"
5. Once inside diskpart type:
  -> list disk (find the one you want to convert)
  -> select disk 0 (select the one you want from the list)
  -> convert mbr (should take a second or two)
  -> quit
6. Continue with install

Method #2:
1. Boot up to installation DVD/CD.
2. Click install but don't follow through.
3. Press SHIFT-F10 to bring up console.
4. Type "diskpart"
5. Once inside diskpart type:
  -> list disk (find the one you want to convert)
  -> select disk 0 (select the one you want from the list)
  -> clean (wait an hour or so until its done)
  -> quit
6. Continue with install------------------------------------------------
root@webservice:/home# fdisk /dev/sdc    

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.


Command (m for help): q


root@webservice:/home# parted /dev/sdc
GNU Parted 2.3
Using /dev/sdc
Welcome to GNU Parted!

(parted) print
Warning: /dev/sdc contains GPT signatures, indicating that it has a GPT table.  However, it does not have a valid fake
msdos partition table, as it should.  Perhaps it was corrupted -- possibly by a program that doesn't understand GPT
partition tables.  Or perhaps you deleted the GPT table, and are now using an msdos partition table.  Is this a GPT
partition table?
Yes/No? yes
Model: ATA Hitachi HDS72102 (scsi)
Disk /dev/sdc: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End    Size   File system  Name  Flags
 1      17.4kB  250GB  250GB                     raid

(parted) mktable
New disk label type? msdos
Warning: The existing disk label on /dev/sdc will be destroyed and all data on this disk will be lost. Do you want to
continue?
Yes/No? yes
Warning: /dev/sdc contains GPT signatures, indicating that it has a GPT table.  However, it does not have a valid fake
msdos partition table, as it should.  Perhaps it was corrupted -- possibly by a program that doesn't understand GPT
partition tables.  Or perhaps you deleted the GPT table, and are now using an msdos partition table.  Is this a GPT
partition table?
Yes/No? yes

setelah di partisi

root@webservice:/home# fdisk /dev/sdc

Command (m for help):

(parted)
sumber :
http://www.digital52.com/help/gptremoval.html