Date: Fri, 5 Sep 2003 22:56:41 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: freebsd-current@freebsd.org Subject: Re: [Patch] mdmfs currently broken Message-ID: <20030905222531.N9760@gamplex.bde.org> In-Reply-To: <8719.1062756317@critter.freebsd.dk> References: <8719.1062756317@critter.freebsd.dk>
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On Fri, 5 Sep 2003, Poul-Henning Kamp wrote: > In message <20030905195552.I9319@gamplex.bde.org>, Bruce Evans writes: > > >> We should not revert to putting BSD labels on everything. > >> > >Disk labels are required by the not unused fsck_ffs utility to search > >for alternate superblocks. > > You mean: > > The widely used fsck_ffs utility is able to use information from > the optional BSD disklabel. I mean: The widely used fsck_ffs utility's ability to find alternate superblocks will be broken when it is most needed if certain parts of disk labels or equivalent metadata is not written automatically somewhere outside of the file system proper. Users who don't know what a disk label or an alternate superblock is can't be expected to back them up or calculate the correct block number to supply to fsck_ffs -b. The file system info in the label is a form of backup of a (very) few parameters. The alternate superblocks are another. Bruce
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