In message <[EMAIL PROTECTED]>, Pedro Martelletto writes: > On Tue, Sep 05, 2006 at 07:24:55PM +0200, Igor Sobrado wrote: > > Indeed, it is a BSD disklabel related problem not a ffs's one. > > It *is* a FFS problem. The superblocks are different.
The BSD disklabel provides information not only about the disk partitions but also about the geometry of the disk--these parameters clearly differ between NetBSD and OpenBSD. (Certainly I do not think that it is a BIOS issue in this case.) If the geometry of the disk differs in NetBSD and OpenBSD any command that uses this information can damage the filesystem. I do not know if you are right, but certainly diverging disklabels can explain the problem I outlined in the first message to this thread; even worse, diverging disklabels are an excellent foundation for my fear about future damages to the files stored in the media. It would be nice making the disklabels (and superblocks if different) compatible again. Don't know the advantages of diverging disklabels (but I guess that BSD developers have not changed the disklabels in incompatible ways without good reasons to do it) but, certainly, the ffs/ffs2 filesystems should strictly follow the model proposed by McKusick for ffs and soft updates in the papers published at ACM TOCS. Cheers, Igor.
