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From: H. Peter Anvin on 25 Jul 2010 04:10
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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From: Tejun Heo on 25 Jul 2010 04:10
(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.

--
tejun
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From: Alex Buell on 25 Jul 2010 04:30
On Sun, 2010-07-25 at 01:07 -0700, H. Peter Anvin wrote:
>
> 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.

Yes but is it possible to boot from a complete 4k sector with the new
standards?
--
http://www.munted.org.uk

One very high maintenance cat living here.
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From: Tejun Heo on 25 Jul 2010 04:30
Hello,

On 07/25/2010 10:07 AM, H. Peter Anvin wrote:
> 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.

Hmmm... doesn't sound too bad then. Is there an easy to test whether
64bit LBA works? I have a 2.5TiB drive and can test the machines I
have and probably publish the result too.

Thanks.

--
tejun
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From: H. Peter Anvin on 25 Jul 2010 15:00
On 07/25/2010 01:26 AM, Alex Buell wrote:
> On Sun, 2010-07-25 at 01:07 -0700, H. Peter Anvin wrote:
>>
>> 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.
>
> Yes but is it possible to boot from a complete 4k sector with the new
> standards?

Yes, but currently there are no 4k *logical* sector products on the
market (and $DEITY knows how many BIOSes would handle them correctly.)
The BIOS interfaces should handle them fine, though.

-hpa

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