max blockdevice/filesystem size?

Bernd Walter ticso at
Sat Jan 31 05:04:06 PST 2004

On Sat, Jan 31, 2004 at 12:45:48PM +0100, Oliver Brandmueller wrote:
> Hi.
> On Sat, Jan 31, 2004 at 01:43:50AM +0100, Melvyn Sopacua wrote:
> > > Since the information in the FAQ seems rather outdated, can someone tell
> > > me, what the maximum size of a UFS2/ffs filesystem is with FreeBSD 5.2?
> > > I'm looking for practical values. Something like: OK, we hit the max
> > > size of a SCSI device, so we use some more of them and vinum. How much
> > > TB would work in a single FS?
> > 
> > See this thread for detailed information:
> >
> Well, I've seen that read earlier, but well it talks a lot about the 
> limits of UFS1 and FBSD 4 - which are by far too low. Plans here were 
> something about 10 TB as a first step. Due to the nature of data and how 
> they are accessed it's not really simple to split them up into different 
> filesystems, as it's not easy to predict which parts grow most.
> Well, would a 10 TB fs work out of the Box with 5.2?

One point for a 10T UFS2 filesystem is a limit of 2G inodes.
Someone mentioned a problem in another thread with more inodes.
Another point is the fsck memory footprint when checking such a
filesystem - that should very much depend on your newfs args and
number of files.
Otherwise it should just work.

B.Walter                   BWCT      
ticso at                                  info at

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