Messages in this thread | | | From | "Grant R. Guenther" <> | Subject | Re: *Help!* Where is device partition info stored by the kernel? | Date | Wed, 11 Jun 1997 15:20:41 -0400 (EDT) |
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> Where does the kernel keep the partition info? I looked all in /proc and > couldn't find it.
There's an array indexed by the minor number inside each block device driver. Look for the fields "start_sect" and "nr_sects" in the source of the driver in question.
> The system HAS NOT been rebooted. I can still mount all of my partitions, > but the second it goes down everything will vanish. The kernel still knows > the old (correct) layout, or else it would not be mounting things. Where is > it hidden?
There's probably a better solution, but at worst you could write a little program to use the BLKGETSIZE ioctl to extract the _size_ of each partition, and then deduce the layout from that.
As a backup solution, you might use dd to capture the first physical block of each of the lost partitions. Take a cksum of each of them, then you can devise some offline method of searching for blocks on the disk that have that cksum.
-------------------------------------------------------------------------- Grant R. Guenther grant@torque.net --------------------------------------------------------------------------
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