newfs limits? 10TB filesystem max?

[Julian Elischer]

Eric Anderson wrote:

> Matthew Jacob wrote:
>
>> BTW- be careful with very large filesystems on FreeBSD- at some point
>> fsck can't check them.
>>
>> I built a sparse 5000TB filesystem which newfs'd and mounted okay, but
>> was not possible to check with fsck. 
>


I would be surprised fi you can check a 5TB filesystem

 From my tests on a full 1TB filesystem, it takes about 700MB of RAM in 
the fsck process PER TB.

>>
>
> 5000TB?!?!   How did you do that?
> Does anyone know of a way to build a simulated filesystem, for testing 
> without a real 20TB disk array?
>
> Eric
>
>