Date: Tue, 12 Sep 1995 20:23:12 +0200 (MET DST) From: "Christoph P. Kukulies" <kuku@gilberto.physik.RWTH-Aachen.DE> To: terry@lambert.org (Terry Lambert) Cc: kuku@gilberto.physik.RWTH-Aachen.DE, freebsd-questions@freefall.freebsd.org Subject: Re: recovering a FS Message-ID: <199509121823.UAA00814@gilberto.physik.RWTH-Aachen.DE> In-Reply-To: <199509121725.KAA21886@phaeton.artisoft.com> from "Terry Lambert" at Sep 12, 95 10:25:27 am
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[...] > > Is there a way (with a program or whatever tool) to reestablish > > or recover a disklabel from a given disk? > > > > Presently the only chance to find certain things is to grep through > > the raw device :-( > > Binary grep the raw device for the file system magic number; this will > give the location of the superblock structures. > > Look at fsck for the definition of the "dynamic" fields in the superblock. > These will be non-zero on the first one. > > This will give you the disk offset of the superblocks, which you can then > enter into your disklabel. Thanks. Magically the disklabel worked when I mounted the partition in question but fsck'ing told me that the Superblock was corrupt and whether it should look for alternate superblock. I bailed out of fsck and hand made a custom 1.1.5.1 floppy that allowed me to nfs mount my backup machine and tar the files over the net. I'm sane again :-) > > > I have often though the perhaps swap should be first to ensure that > an overwrite like this would not necessarily touch important data. > > On the other hand, you aren't supposed to put anything important in > the '/' but distribution files (and system configuration because of > stupid writeable '/etc'), and '/' has to be below 1024 for BIOS to > see it. > > > Terry Lambert > terry@lambert.org > --- > Any opinions in this posting are my own and not those of my present > or previous employers. > --Chris Christoph P. Kukulies kuku@gil.physik.rwth-aachen.de
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