linux-kernel - Re: support for drives larger than 2TiB

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Message-ID: <4C4BF0D2.1070503@zytor.com>
Date:	Sun, 25 Jul 2010 01:07:46 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Yuhong Bao <yuhongbao_386@...mail.com>, jeff@...zik.org,
	ben.collins@...ntu.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, hmh@...ian.org
Subject: Re: support for drives larger than 2TiB

On 07/25/2010 01:01 AM, Tejun Heo wrote:
> (cc'ing hpa, hi!)
> Hello,
> 
> On 07/24/2010 08:40 PM, Yuhong Bao wrote:
>>> However, 2TiB limit is
>>> inherent in the BIOS programming interface and currently the only way
>>> to overcome it is using a completely different BIOS interface (EFI,
>>> that is).
>>
>> Nope, look at the Int13 extensions, it already support 64-bit LBA.
> 
> Ah, yeah, that sounds much more logical than requiring transition to
> EFI.  Does anyone know how wide spread the support for this extension
> is in BIOSes?  Do the bootloaders support this?
> 
> Thanks.
> 

Syslinux 4 supports it with full 64-bit capabilities.  SeaBIOS (used in
Qemu/KVM) supports it, and I know at least some hardware/firmware RAID
solutions support it; I recently got access to a 3 TB SATA drive but due
to NDA requirements I can't reveal the results of that testing.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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