Corrupted partition table

[Garance A Drosihn]

At 8:01 PM -0700 9/24/04, Chris Pressey wrote:
[...] the following would be *very* helpful:

- the output of 'fdisk -s' from the DragonFly Live CD *before*
  you start the install,
- the file /tmp/install.log after the install is done (of course,
  if the install doesn't work, getting that file will prove
  difficult...
The install works, in the sense that I can boot up into Dragonfly.
(I have to go through some odd steps to get there, but it works)
- the output of 'fdisk -s' after the install.
Before I go thru the whole install, let me see if the following
info will provide enough info to take a guess at things:
On the FreeBSD 5.3-beta5 system that I had installed first, I did:

    # fdisk -s
    /dev/ad4: 232581 cyl 16 hd 63 sec
    Part        Start        Size Type Flags
       1:          63    43005942 0xa6 0x00
       2:    43006005    24563385 0xa6 0x00
       3:    67569390    73722285 0xa5 0x80
       4:   141291675    93144870 0x83 0x00
I then wanted to change the sysid on the first DOS slice:

    # fdisk -u1
    ******* Working on device /dev/ad4 *******
    parameters extracted from in-core disklabel are:
    cylinders=232581 heads=16 sectors/track=63 (1008 blks/cyl)
    Figures below won't work with BIOS for partitions not in cyl 1
    parameters to be used for BIOS calculations are:
    cylinders=232581 heads=16 sectors/track=63 (1008 blks/cyl)
    Do you want to change our idea of what BIOS thinks ? [n]
    Media sector size is 512
    Warning: BIOS sector numbering starts with sector 1
   [...etc...]
After committing the change, I did:

    # fdisk -s
    /dev/ad4: 232581 cyl 16 hd 63 sec
    Part        Start        Size Type Flags
       1:          63    43005942 0xa5 0x00
       2:    43006005    24563385 0xa6 0x00
       3:    67569390    73722285 0xa5 0x80
       4:   141291675    93144870 0x83 0x00
I booted up on the Dragonfly CD.  The first minor hurdle is that
my hard disk is apparently installed as "ad4", so what I did was:
    # cd /dev
    # ./MAKEDEV ad4
    # fdisk -s /dev/ad4
    ad4: raw partition size != slice size
    ad4: start 63, end 43006004, size 43005942
    ad4c: start 63, end 234436544, size 234436482
    ad4: truncating raw partition
    ad4: rejecting partition in BSD label: it isn't entirely within the slice
    ad4: start 63, end 43006004, size 43005942
    ad4h: start 14563391, end 234436544, size 219873154
    /dev/ad4: 14593 cyl 255 hd 63 sec
    Part        Start        Size Type Flags
       1:          63    43005942 0xa5 0x00
       2:    43006005    24563385 0xa6 0x00
       3:    67569390    73722285 0xa5 0x80
       4:   141291675    93144870 0x83 0x00
I don't know if all those warning messages about "ad4:" are
significant, and I don't know if the fact that this is ad4 (and
not ad0) would be significant to the installation steps.  But I
suspect that it is significant that FreeBSD says:
       /dev/ad4: 232581 cyl  16 hd 63 sec
vs     /dev/ad4:  14593 cyl 255 hd 63 sec  on Dragonfly.
--
Garance Alistair Drosehn            =   gad at xxxxxxxxxxxxxxxxxxxx
Senior Systems Programmer           or  gad at xxxxxxxxxxx
Rensselaer Polytechnic Institute    or  drosih at xxxxxxx