ext3 limits?

Eric Sandeen sandeen at redhat.com
Tue Apr 29 15:03:36 UTC 2008

Eric Sandeen wrote:
> Christian Kujau wrote:
>> On Mon, April 28, 2008 12:49, Jordi Prats wrote:
>>> I have a 4246GB ext3 filesystem exported by NFS on a 32 bits
>>> architecture. Some applications are generating estrange errors, so maybe
>>> I'm facing a ext3 limit?
>> http://batleth.sapienti-sat.org/projects/FAQs/ext3-faq.html says:
>>    Ext3 can support files up to 1TB. With a 2.4 kernel the filesystem size
>>    is limited by the maximal block device size, which is 2TB. In 2.6 the
>>    maximum (32-bit CPU) limit is of block devices is 16TB, but ext3
>>    supports only up to 4TB.
> Actually as of 2.6.18 (or is it .19...), ext3 kernel code should support
> the full 16T, at least in terms of being able to address that many
> blocks w/o corruption.  I did a fair amount of work in that time frame
> to root out all the sign overflows etc to allow ext3 to get to 16T.

Oh, and prior to that, really 8T should be fine.


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