Re: fdisk vs cfdisk... And is my drive borked or what?

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On 19-03-10 19:34, Joe(theWordy)Philbrook wrote:

[ fixing a partition table ]

I can now certify that rebuilding them with fdisk works... ;)  {see
below}

Good work.
On a funny note; i read today that fdisk also has an option to "fix" an existing partition table (under expert options)...

It would appear that on Mar 18, Guus Snijders did say:

To be safe, first make an *exact* note (on paper) of the current
partition table. If anything goes wrong, you can boot a rescue CD
and recreate the partition table from this note. You could also
make a copy of the first sector with dd and store that on some
media (USB hdd comes to mind), but i would still make the paper
note.

I did print the partition table data... I'm not good with dd. I've
got explicit notes on using it to backup/restore the mbr, and have a
copy of that on the usb drive (is that what you mean?) but using it
back-up the rest of the partition table is beyond me.

Looks like the partition table is stored on the first sector of the disk, so restoring a copy of that sector also restores the table.
But yes; storing a copy of the MBR on an external disk is what i meant.

After that, just change the end sector of the extended partition to
match the end sector of your swap partition and you should be
fine. (try starting cfdisk at this point to see if the error still
exists).
Basically that's what I did with fdisk. I had a text file with the
table data in it on the usb drive. which I opened in one window while
I ran fdisk in another.
[...]

And it worked.

Great, that's good news.

If you're feeling brave, you could also recreate the entire
partition table from scratch. It's just a table listing which
partitions are where. Nothing more.

I could have done that. But why mess with the 1st 3 partitions???

You're right, it wasn't neccesary in this case, but it sometimes happens that the order of partitions get messed up. On such occasion it might be worthwhile to just recreate the whole table.


mvg,
   Guus


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