Same Folders in two Drives

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http://askubuntu.com – Sir, I reinstalled ubuntu 8.10 on my system which had Windows XP also. Previously Ubuntu was in sda9.Then I tried to install ubuntu 11.04 from a bootable CD.It went through all preliminaries.I selected sda 9 for installing ubuntu 11.04.It proceeded with installation for some time and then it crashed.The reason given was that my CD drive was defective and hence it has crashed.However when it was installing, I observed that a new folder sda 10 was getting created without my permission or authorisation. On subsequent restarts, grub error 7 was reported and computer was not booting.Then I (HowTos)