Date: Thu, 24 Apr 1997 02:23:11 +0930 (CST) From: Kristian Kennaway <kkennawa@physics.adelaide.edu.au> To: freebsd-questions@freebsd.org Subject: Re: Corrupted disk slice Message-ID: <9704231653.AA13169@bragg>
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> > Wolfgang Helbig <helbig@MX.BA-Stuttgart.De> wrote: > > > Extended partitions are not recognized by our fdisk, so it says it's > > unused. > > That's not true. As my inclusion of my 'fdisk' output showed, my extended > partition is partition 1 (aka slice 2): > > The data for partition 1 is: > sysid 5,(Extended DOS) > start 1048320, size 3144960 (1535 Meg), flag 0 > beg: cyl 130/ sector 1/ head 0; > end: cyl 519/ sector 63/ head 127 > > > If you build a file system on slice four, it is overlaid by the extended > > partition and the logical partitions inside the extended partition. > > No - there is nothing magic about slice four. (this is all on a 2.1.5R > system, but I'm pretty sure I've seen the same thing on earlier versions) Okay, so what you are saying is that the fact that I had a freebsd partition on wd1s4, with dos partitions on wd1s1 and wd1s5, could not have been the single cause of the now-missing partition? Since sysinstall was the one who decided to put my partition on wd1s4, I'd think this is the case. The following may help: [morden] 1:46 ~ fdisk wd1 ******* Working on device /dev/rwd1 ******* parameters extracted from in-core disklabel are: cylinders=621 heads=128 sectors/track=63 (8064 blks/cyl) parameters to be used for BIOS calculations are: cylinders=621 heads=128 sectors/track=63 (8064 blks/cyl) Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 0 is: sysid 6,(Primary 'big' DOS (> 32MB)) start 63, size 2048193 (1000 Meg), flag 0 beg: cyl 0/ sector 1/ head 1; end: cyl 253/ sector 63/ head 127 The data for partition 1 is: sysid 5,(Extended DOS) start 2048256, size 2048256 (1000 Meg), flag 0 beg: cyl 254/ sector 1/ head 0; end: cyl 507/ sector 63/ head 127 The data for partition 2 is: sysid 165,(FreeBSD/NetBSD/386BSD) start 4096512, size 911232 (444 Meg), flag 80 beg: cyl 508/ sector 1/ head 0; end: cyl 620/ sector 63/ head 127 The data for partition 3 is: <UNUSED> I'm assuminbg partition 3 here is the one which I used to have but no longer do. partition 1 is on wd1s5, 2 is on wd1s3. Trying to disklabel the invalid partition gives me this: [morden] 1:54 /dev disklabel -r rwd1s4e disklabel: /dev/rwd1s4e: Invalid argument and likewise with the other slices on this partition. Kristian
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