Will Ubutu 10.04 HDDinstallation delete only the old win7 or the complete data ofHDD? topic

Hi

Instalation menu has a contradicitive definitions:
1. Delete and use complete HDD (500GB)

2. Win 7 (loader) 85,9GB, Windows Vista (loader)13,8 GB, Windows Vista (loader)108MB will be deleted and Ubuntu 10.04 will be installed

1. sounds like complete deletion at least I am not sure if my 485 GB data of the old Win7 HDD will be deleted too.

However, I also can choose manual fixing partitions, but there are 4 partitions: /dev/sda1 ntfs 208MB occupied 69MB, /dev/sda2 ntfs 486GB occupied: unknown, /dev/sda3 ntfs 13.8GB occupied 11,6GB, /dev/sda4 fat 32 108MB,occupied: 33MB. For each I can activate formatting select for8nknown filesystems or that a partition will not be used.

I do not now what to do? Any help?

Should I use a certain partition as swap file? How big?

Regards

Ubuntu become read only with data disappearance topic

Recently an group was created in ubuntu 12.04 server and the user created when OS was installed was added in the group, but somehow the user got deleted from root privilege groups and privilege commands were not working So rebooted the system did #mount -rw -o remount / then added that user to multiple default groups like sudo,lpadmin,dip,cdrom etc, then rebooted the server and found to my horror that all the data in /home is gone and I am not even able to create anything it says permission denied even for touch command. Where it went wrong, any ideas on how to recitfy this is highly appreciated. Thanks in advance.