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From: Silvar Beitel on 9 Jul 2008 11:32
Most of the various SD cards I have examined have Master Boot Records
on them (like a hard disk), but one (a Dane-Elec 128 MB) has none and
starts right in with the (obviously only) volume Boot Record, like a
floppy disk. Is there a "simple" "standard" way to tell whether or
not a card has one?

Obrigado in advance :-)

--
Silvar Beitel
From: robertwessel2 on 9 Jul 2008 17:45
On Jul 9, 10:32 am, Silvar Beitel <silverbee...(a)net1plus.com> wrote:
> Most of the various SD cards I have examined have Master Boot Records
> on them (like a hard disk), but one (a Dane-Elec 128 MB) has none and
> starts right in with the (obviously only) volume Boot Record, like a
> floppy disk.  Is there a "simple" "standard" way to tell whether or
> not a card has one?


You can read the first sector of the disk and looking to see if it has
a partition table in it, or you can read the first sector of the
volume on the device, and assuming it's FAT (12/16/32), the disk will
be partitioned if the hidden sector count (at offset +28) is non-
zero. The latter is generally possible for non-FAT filesystems as
well, but the details vary.
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