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I am trying to install clear os on external usb hdd connected to lenovo laptop with windows 7 and ubuntu 16.04 dual booting working. I have used neosmart to boot ubuntu as grub does nto detect windows. this is not my question. Both windows 7 and ubuntu are working well. But i am unable to custom partition external hdd to install clearos. Ext. Hdd is 680 gb capacity with 4 partitions made. I use them for data. I want install on one of the partions. while custom partitioning, i get error

"unable to allocate free space"

after i allocate space to /boot.
Can anybody tell me step by step partitioning. I am not expert in linux. i have done couple of installations of dual booting linux and windows.
Pls help me
Monday, April 02 2018, 02:41 PM

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    Monday, April 02 2018, 03:19 PM - #Permalink
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    As a new poster, your first couple of posts have to be approved before they appear on the forum, so I've deleted your duplicate post.

    ClearOS needs three partitions, one for /boot, swap and /. /boot should be at least 500MB, swap is generally between 1 to 2 times your memory size and / should probably be at least 10GB but it depends on what you want to do with ClearOS. Have a look at the User Guide here as well. They do an alternative scheme using LVM., still with a 500MB /boot but swap and / will end up in a single logical volume instead.
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