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I am encountering this error and do not know how to go round it. Please help on this issue.
Error creating partition: helper exited with exit code 1: In part_add_partition: device_file=/dev/sda, start=0, size=40007368704, type=0x0c
Entering MS-DOS parser (offset=0, size=80026361856)
looking at part 0 (offset 1048064, size 40006320640, type 0x05)
Entering MS-DOS extended parser (offset=1048064, size=40006320640)
readfrom = 1048064
Exiting MS-DOS extended parser
looking at part 1 (offset 40007368704, size 500170752, type 0x82)
new part entry
looking at part 2 (offset 40509504000, size 39514245120, type 0x0c)
new part entry
looking at part 3 (offset 0, size 0, type 0x00)
new part entry
Exiting MS-DOS parser
MSDOS partition table detected
containing partition table scheme = 0
added partition start=512 size=1047552
Error: Error informing the kernel about modifications to partition /dev/sda1 -- Device or resource busy. This means Linux won't know about any changes you made to /dev/sda1 until you reboot -- so you shouldn't mount it or use it in any way before rebooting.
Warning: The kernel was unable to re-read the partition table on /dev/sda (Device or resource busy). This means Linux won't know anything about the modifications you made until you reboot. You should reboot your computer before doing anything with /dev/sda.
My first suggestion is that you do yourself a favor and navigate to the LinuxQuestions Wiki and read the article on How to Ask a Question. Then return to your post and edit it appropriately. It will be a great help to anyone who proposes to help you.
Now, having said that.
1) Which GNU/Linux distro are you using?
2) Which partitioning tool are you using?
3) Are you booted into your distro at the time you try to repartition? That is a very big NO-NO if partition manipulation involves mounted partitions. You should never try to resize a mounted partition. You may create/resize unmounted partitions.
4) Are you using a liveCD and trying to partition an un-mounted disk?
5) What are you trying to accomplish? An outline of the partitioning scheme you want would help. If you have installed one or more OSs, which partition(s) are they on? The output of "fdisk -l" (run as root) would also help.