write partition table from the command line

gnashley · 07-27-2006, 07:38 AM

gpart is something else you might look at:
http://distro.ibiblio.org/pub/linux/...afx-i486-1.tgz

Randux · 07-27-2006, 09:16 AM

Quote:

Originally Posted by drkstr

HI. Thank you everyone for your responses. For what I am going to be doing, dumping the partition table, updating it, then writing back over the original will work the best for me. This will allow me to modify the partition table without having to reboot the system (pretty neat little trick).

Moved rest of post to it's own thread since it was sort of off-topic
http://www.linuxquestions.org/questi...newthread&f=14

I'm not sure if this is a safe assumption- some OS and apps may cache the partition table and not refresh the cache. I am pretty sure for example that OpenBSD maintains a cache of its own disklabel based on what it finds during init.

It's probably best to reboot after modifying the partition table on disk.

drkstr · 07-27-2006, 10:14 AM

thanks for the warning.

The system will actually be rebooted after all is said and done. I didn't really mention the other reason for using this method which is the fact that it is "perl firendly". I need to write a perl function that will be called with rewritePartitionTable($strDeviceName); where $strDevice name = the Name of the Disk. The function will then delete a selected partition and turn it into 2 smaller partitions at a ratio of 80:20

this is for a GPL project I am working on with a friend of mine. He is writing all the user interface code and I am writing the functionality. The way the function is called is out of my controll.

regards,
...drkstr

Randux · 07-27-2006, 12:36 PM

Very interesting! Let us know how it turns out.