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Date:      Sun, 9 Nov 2008 12:21:26 +0100
From:      Roland Smith <rsmith@xs4all.nl>
To:        Polytropon <freebsd@edvax.de>
Cc:        Jeremy Chadwick <koitsu@freebsd.org>, freebsd-questions@freebsd.org, no-spam@people.net.au
Subject:   Re: UFS2 limits
Message-ID:  <20081109112126.GA46364@slackbox.xs4all.nl>
In-Reply-To: <20081109104711.e03722c4.freebsd@edvax.de>
References:  <50261.1226194851@people.net.au> <20081109024046.GB27423@icarus.home.lan> <20081109093521.GA73108@owl.midgard.homeip.net> <20081109104711.e03722c4.freebsd@edvax.de>

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On Sun, Nov 09, 2008 at 10:47:11AM +0100, Polytropon wrote:
> On Sun, 9 Nov 2008 10:35:21 +0100, Erik Trulsson <ertr1013@student.uu.se>=
 wrote:
> > Note that this does not limit the number of files you can have in a sin=
gle
> > directory, since normal files do not contain hardlinks to the parent
> > directory, but there are of course limits to the total number of files =
and
> > directories you can have on a single filesystem based on how many inodes
> > were created when the filesystem was first created.
>=20
> Maybe this sounds stupid, but... given that a file system
> can hold n entries. What happens when a program tries to
> create file number n + 1?

The call to the open(2) system call will fail for one of the reasons
given in the manual page.
=20
> I do ask this in order to explore if this could have been
> the reason for my massive data loss and UFS file system
> corruption.

My first point of inquiry in such a case would be if the hardware is
OK. If you're using (P|S)ATA|SCSI-3 devices, install smartmontools from
ports and test the disk with smartctl(8).

Roland
--=20
R.F.Smith                                   http://www.xs4all.nl/~rsmith/
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