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Date:      Sun, 27 Nov 2011 10:23:38 +0800
From:      Fbsd8 <fbsd8@a1poweruser.com>
To:        Warren Block <wblock@wonkity.com>
Cc:        "Julian H. Stacey" <jhs@berklix.com>, questions@freebsd.org, Robert <traveling08@cox.net>
Subject:   Re: Invalid fdisk partition table found (fwd)
Message-ID:  <4ED19F2A.2010700@a1poweruser.com>
In-Reply-To: <alpine.BSF.2.00.1111261832130.9873@wonkity.com>
References:  <201111241116.pAOBGH4i098240@fire.js.berklix.net>	<20111124113938.2d99eec2@dell64>	<alpine.BSF.2.00.1111241326490.69990@wonkity.com>	<20111125095457.477e9501@dell64>	<alpine.BSF.2.00.1111251325020.81363@wonkity.com>	<20111126135557.56f4ea06@dell64> <alpine.BSF.2.00.1111261832130.9873@wonkity.com>

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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@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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