Invalid fdisk partition table found (fwd)
Fbsd8
fbsd8 at a1poweruser.com
Sun Nov 27 02:34:05 UTC 2011
Warren Block wrote:
> On Sat, 26 Nov 2011, Robert wrote:
>
>> Some difference today. Not sure at what point this happened but one of
>> my CF cards now reads:
>>
>> [robert at dell64] ~> fdisk /dev/da1
>> ******* Working on device /dev/da1 *******
>> parameters extracted from in-core disklabel are:
>> cylinders=2057 heads=255 sectors/track=63 (16065 blks/cyl)
>>
>> Figures below won't work with BIOS for partitions not in cyl 1
>> parameters to be used for BIOS calculations are:
>> cylinders=2057 heads=255 sectors/track=63 (16065 blks/cyl)
>>
>> fdisk: invalid fdisk partition table found
>> Media sector size is 512
>> Warning: BIOS sector numbering starts with sector 1
>> Information from DOS bootblock is:
>> The data for partition 1 is:
>> sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
>> start 63, size 33045642 (16135 Meg), flag 80 (active)
>> beg: cyl 0/ head 1/ sector 1;
>> end: cyl 8/ head 254/ sector 63
>> The data for partition 2 is:
>> <UNUSED>
>> The data for partition 3 is:
>> <UNUSED>
>> The data for partition 4 is:
>> <UNUSED>
>>
>> Now showing 16GB but still not right.
>>
> ...
>> I also did this in single user with the same results. Ideally, I would
>> like to change these cards to FAT32 but I cannot get there with fdisk
>> and am not sure how to get there with gpart or if I can.
>
> Creating an MS-DOS layout with gpart(8), where the disk is da0:
>
> # gpart destroy -F da0
> da0 destroyed
> # gpart create -s mbr da0
> da0 created
> # gpart add -t "\!11" da0
> da0s1 added
>
> 11 is 0x0b, the FAT32 partition type. There might be a more mnemonic
> string for it, this is the first time I've ever used gpart for FAT32.
> The exclamation is for gpart/GPT, and the backslash is to keep the shell
> from messing with it.
>
> # gpart show da0
> => 63 15662997 da0 MBR (7.5G)
> 63 15662997 1 fat32 (7.5G)
>
> # ls /dev/da0*
> /dev/da0 /dev/da0s1
> # newfs_msdos -F32 /dev/da0s1
>
> fdisk(8) may be easier, just set the partition type to 11.
>
The correct partition type is 12 not 11.
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