FAQ answer unclear: filesystem size limit

Lowell Gilbert freebsd-questions-local at be-well.ilk.org
Tue Nov 25 05:54:59 PST 2003

Dan Pelleg <daniel+bsd at pelleg.org> writes:

> I am trying to determine the maximum filesystem size on -STABLE. Assuming I
> have a hardware RAID device that appears as a single 1.5TB drive, can I use
> it for UFS1 on -STABLE? The FAQ is saying:
> "For ffs filesystems, the maximum theoretical limit is 8 terabytes (2G
> blocks), or 16TB for the default block size of 8K. In practice, there is a
> soft limit of 1 terabyte, but with modifications filesystems with 4
> terabytes are possible (and exist)."
> Does anyone know what the modifications are, and if they are considered
> stable enough for production use?

Last I recall, that was kind of DG's thing, but most people just
increase the block size (which is an appropriate adjustment for most
really big filesystems anyway -- they tend to be for big files).

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