On Tue, 6 Jan 2004 15:05, Sergey 'DoubleF' Zaharchenko wrote: > On Tue, 6 Jan 2004 13:29:26 +1030 > > Malcolm Kay <[EMAIL PROTECTED]> probably wrote: > > On Tue, 6 Jan 2004 10:59, Scott I. Remick wrote: > > > Sorry for the delay... holidays had me busy. > > Me too:) > > > > Hopefully you're still around > > > and interested in picking up where we left off. I think we're > > > definitely onto something... > > > > Looking back over some of your e-mails I find: > > QUOTE > > su-2.05b# disklabel -r /dev/ad6s1c > > # /dev/ad6s1c: > > 8 partitions: > > # size offset fstype [fsize bsize bps/cpg] > > c: 156344517 63 unused 0 0 # "raw" part, > > don't edit > > e: 156344517 63 4.2BSD 2048 16384 89 > > partition c: partition extends past end of unit > > disklabel: partition c doesn't start at 0! > > disklabel: An incorrect partition c may cause problems for standard > > system utilities > > partition e: partition extends past end of unit > > > > That doesn't look good. > > ENDQUOTE > > > > The 63 offset is spurious. I've seen this before somewhere but can't > > remember the details -- i.e the value 63. > > I know where you've seen this. The normal offset for the first *slice* > is 63 sectors, for some historical reasons (those extra sectors were to > be used for bad block replacement or something like that). >
Yes, I expect it in the output from fdisk. Ignoring for the moment that the BIOS ideas of geometry has nothing to do with the physical reality; all slices start at sector 1 of a track so having used sector 1 of the first track (cylinder 0 head 0) for the MBR, the first slice must start at cylinder 0 head 1 sector 1; usually an offset of 63 with the assumed virtual geometry. (Nothing to do with bad block replacement which on modern drives is almost completely hidden) But I have seen the 63 before in corrupted disklabels, not just slice positions. > Not sure how the 63 made it into the disklabel, though. Neither do I. Malcolm Kay _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
