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I have Windows 8.1 on C: drive and i want to install Ubuntu14.04 on D: drive and i will be extending D: drive with E: what i want to know is ,is it fine if i select install "Ubuntu alongside windows" option and is it ok to keep three partitions?

scenario:

C: 100GB Primary partion(Boot,page file,crash dump) <== windows 8.1 installed

D:50GB Logical partition

E:50GB Logical partition <==will merge with D:

F:90GB Logical partition

  • The short answer is yes it's ok to keep three partitions. The long answer is you should check for existing answers on dual booting win 8.1 and Ubuntu before proceeding. – Elder Geek Sep 30 '14 at 16:01
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Try it! Select the alongside option. The installer then will you set how much space is going to be used for Ubuntu. If it shows three partitions, you're fine. But I assume it will attempt to split up the Windows partition. If this is the case, go back and select "Something else".

Now it will ask you to set up everything manually. Do the following:

  1. Delete E: (probably sda3, I can't tell) resize D: (sda2). Leave some space the size of your RAM
  2. Create a new partition between D: and F: of the size of your RAM. E.g. If you have 8GiB of RAM, create a 8GiB partition.
  3. Format this new partition as linux-swap
  4. Format D: as ext4
  5. Select the disk, where all those partitions are on, as bootloader device (most likely /dev/sda)
  6. Apply and install.

This instructions my contain something that won't work, but it won't damage your Windows, if you don't do anything stupid. But you should still create a backup of all your important data, since partitioning can always harm the data on the affected disk.

  • i have 3 Gb RAM so my swap area should be 3 GB? and what if i give more than 3Gb, my machine will be faster? – Govinda Sakhare Sep 30 '14 at 14:18
  • It may be more efficient when the RAM is completely used. Except for this case, it's useless. As you only have 3GB of RAM, I'd give it a bit more, let's say 4GB. However, heavy swapping will slow your system down very much. To regulate swappiness, read this: askubuntu.com/questions/103915/how-do-i-configure-swappiness – s3lph Sep 30 '14 at 14:25
  • Did everything work as intended? – s3lph Sep 30 '14 at 14:25
  • no right now backing my data and then gonna install thanx anyways – Govinda Sakhare Sep 30 '14 at 14:33
  • thanx i gave 4 GB but i heard Linux is very fast and still my Windows 8 is faster than Ubuntu 14.04. – Govinda Sakhare Oct 1 '14 at 16:01

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