how to know the present partition system when the partition table is overwritten?

[jdd]

Hello,

I know this is not the true object of this mailing list, But you are
probably very good on the subject and I don't know where to ask :-(

I'm the "Partition HOWTO" author. One of my readers says that:

* he have overwritten the partition table on a bad way
* but the computer is still on (no reboot)

How can I know what are the partition limits (sectors) to rebuild the
good table? The kernel knows, of course, but what command can I use to
read this from meory, the disk file being lost?

thanks
jdd

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