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I bought a VAIO laptop which Windows 8 preinstalled on it in UEFI mode. Now I want to install Debian 7 besides Windows 8 but when I entered to the Partition Setup of debian setup menu, there is a partition which named EFI partition system.

My question is do I have to create another partition for debian to boot in UEFI? or EFI partition system which belongs Windows8 is enough?

And if I have to create another EFI boot partition for Debian 7, What name should I choose for it? And do I have to delete EFI partition system?


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See if this helps you in any way:… – Leathe May 24 '13 at 6:01
Thanks, I'll read it. – Sepahrad Salour May 24 '13 at 6:43

The EFI System Partition (ESP) holds boot loaders and related files. It's intended to be shared between OSes, so you should be able to use a single ESP for both Windows and Linux. In fact, that's preferable to using multiple ESPs because the Windows installer reacts badly to the presence of multiple ESPs; it tends to get confused and hangs mid-install. (At least, that was true of Windows 7; I haven't tried with Windows 8.) That said, the EFI spec does explicitly permit multiple ESPs, so this is definitely a Windows bug.

Previous versions of Debian and Ubuntu had a bug that caused them to wipe the contents of the ESP during installation. I haven't checked the latest Debian to see if this bug has been fixed, but I recommend caution on this score; you should back up the ESP using Windows or a Linux live CD before installing Debian. If the installer erases the ESP, you'll then be able to restore your Windows boot loader from your backup.

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