Re: support for drives larger than 2TiB

From: H. Peter Anvin
Date: Sun Jul 25 2010 - 04:08:30 EST

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.


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

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