Date: Tue, 12 Oct 2010 11:56:49 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Kevin Oberman <oberman@es.net> Cc: stable@freebsd.org, Pawel Jakub Dawidek <pjd@FreeBSD.org> Subject: Re: Label question...why does ufs label vanish on mount? Message-ID: <20101012185649.GA38850@icarus.home.lan> In-Reply-To: <20101012185100.5AA661CC3E@ptavv.es.net> References: <20101012185100.5AA661CC3E@ptavv.es.net>
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On Tue, Oct 12, 2010 at 11:51:00AM -0700, Kevin Oberman wrote: > For some reason the /dev/ufs/label entry that geom creates for every UFS > formatted partition is deleted when the device is mounted. This is not > the case for other file systems, though I have not tried them all. It > makes the drive much harder to deal with when you have to keep track of > which physical drive contains the labeled media. It is a particular > issue for hald and the tools which depend on it. > > Is there a good reason for this odd behavior of UFS? If there is not a > good reason, could it be changed? I'm not sure if you're talking about "tunefs -L", or glabel(8). If you're talking about glabel(8): gotta read the man page carefully. There's two types of labels: "automatic" (glabel label) and "manual" (glabel create). "Automatic" labels are stored in the disk metadata, so they're retained after reboots + loaded during tasting, etc.. "Manual" labels are temporary, and have to be manually set every time the system starts. As for "tunefs -L" -- I never quite understood what this was for given glabel's existence. I don't know if the two are synonymous in some way either. I'm certain someone here can shed light on that association, if any at all. HTH, FWIW... -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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