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I have ubuntu installed on a 500 GB drive that is not formatted in any way, not ntfs, ext, or fat. I have been using this for some time and no errors have occurred. Would it be safe to install opensuse on the same drive? I am already multibooting with other windows and linux installs on other drives. EDIT: Sorry, I guess it is formatted ext 4 accorrding to the below. Every other drive manager I have used has always returned nothing.
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sdb1 ext4 469015024 51725960 393464424 12% /
none devtmpfs 2024156 408 2023748 1% /dev
none tmpfs 2028672 608 2028064 1% /dev/shm
none tmpfs 2028672 224 2028448 1% /var/run
none tmpfs 2028672 0 2028672 0% /var/lock
none tmpfs 2028672 0 2028672 0% /lib/init/rw

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The question is nonsense. You cannot install Ubuntu on a non-formatted drive. Try df -T from a terminal to see what filesystem you're actually using on the drive. –  frabjous Jan 22 '11 at 18:23
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up vote 1 down vote accepted

You can't install ubuntu on nothing. there has to be some sort of formating going on, be it ext2, ext3, ext4, xfs, reiserfs or whatever you can come up with. as long as you have kernel support for that particular file system on your computer and it has reasonable file permission and owner support you can install linux on it. it's just a matter of which file system.

Last time I checked ubuntu does not boot from raw file system. You can boot linux (the kernel) off a disk technically without a file system (dd if=vmlinuz of=/dev/fd0 etc..) and then use rdev to set the root fs but i doubt you would ask such a question if you knew all these...

to answer your question - most likely ubuntu had partitioned your harddrive without you knowing (or you may have forgotten, ubuntu had a nice installer, at least for me coming from using slackware and debian from early versions....) you need to resize the partition if you don't want to destroy the partitions.

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