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I have installed centos 5.8 with Hetzner server rescue mode but its disk parttion table is in MSDOS formate which does not support more than 2 TB space of disk so i need to change the partition table into GPT formate.but enable to install os in Gpt formate how can i cange parttion table formate from dos to gpt. Thanks in advance.

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up vote -2 down vote accepted

Boot using RescueCD from Hetzner.

parted /dev/sda
mkpart primary 1MB 512MB
set 1 boot on
parted /dev/sda
mkpart primary 512MB -1MB    
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1
mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/sda2 /dev/sdb2

And next create LVMs, format partition and use VNC instalation.

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What does this have to do with using a GPT partition or getting partition sizes larger than 2 TB? – Michael Hampton Mar 20 '13 at 10:51

You don't. GPT support is available on EL6, but not on EL5.

So Hetzner should never have offered you this distribution.

To resolve the issue, install CentOS 6 instead.

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Thank you Michael. – user133916 Jan 20 '13 at 9:25

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