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<SOLVED> Question about partitioning for a dual-boot install

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philotux
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<SOLVED> Question about partitioning for a dual-boot install

#1

Post by philotux » Fri Jan 25, 2019 4:53 pm

I plan to do a fresh install of MX 18 and Manjaro on a 120 G SSD which I will boot from externally and will be used for testing.
What I had in mind with regard too partitioning is something along the following lines:

EFI-system partition: 256-512 MB FAT32 flagged as boot,esp
MX 18 root 25-30 GB
Manjaro root 25-30 GB
shared home the rest of the disk.

What I would like to know is if it is possible to share the home partition between the two , if I create different users when installing each of the above mentioned OS:es, thus eliminating configuration conflicts between them.

Do you think this is feasible? Any downsides or pitfalls to avoid?

TiA
Last edited by philotux on Mon Feb 04, 2019 9:52 am, edited 1 time in total.

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towwire
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Re: Question about partitioning for a dual-boot install

#2

Post by towwire » Fri Jan 25, 2019 5:25 pm

philotux wrote:
Fri Jan 25, 2019 4:53 pm
I plan to do a fresh install of MX 18 and Manjaro on a 120 G SSD which I will boot from externally and will be used for testing.
What I had in mind with regard too partitioning is something along the following lines:

EFI-system partition: 256-512 MB FAT32 flagged as boot,esp
MX 18 root 25-30 GB
Manjaro root 25-30 GB
shared home the rest of the disk.

What I would like to know is if it is possible to share the home partition between the two , if I create different users when installing each of the above mentioned OS:es, thus eliminating configuration conflicts between them.

Do you think this is feasible? Any downsides or pitfalls to avoid?

TiA
Why EFI partition so big? I have 3 Linux's installed and mine is formatted fat32 100 MiB and it only uses 1.67 MiB.
As for the root's I would not go over 16 GB unless you are going to install a hell of lot.
I would do separate home's and a data partition using system links in the smaller homes for files or folders.

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fehlix
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Re: Question about partitioning for a dual-boot install

#3

Post by fehlix » Fri Jan 25, 2019 6:15 pm

philotux wrote:
Fri Jan 25, 2019 4:53 pm
EFI-system partition: 256-512 MB FAT32 flagged as boot,esp
MX 18 root 25-30 GB
Manjaro root 25-30 GB
shared home the rest of the disk.
EFI is fine , so you have enough playground, for other stuff or future installs. ( e.g. rEFInd etc)
I do not recommend to share home, even not with mutiple MX installs.
Simple reason: user's home does not only contain data, but also a lot of internal settings used
by applications for the user. I do personaly keep home within the root-partition.
And use a shared data partition for Download, Document, video, Picture etc folder.
You can within fstab mount this data partition and either symlink Download etc to user's home
or bind-mount those folders.
So with having a shared data partion:
30 GB for MX is fine and probably also for Manjaro. I do personally have Manjaro 60GB,
is it is a rolling release and I kept it running for a couple of years.
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philotux
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Re: Question about partitioning for a dual-boot install

#4

Post by philotux » Fri Jan 25, 2019 6:31 pm

Thank you towwire and fehlix for the input!
fehlix wrote:
Fri Jan 25, 2019 6:15 pm
I do not recommend to share home, even not with mutiple MX installs.
Simple reason: user's home does not only contain data, but also a lot of internal settings used
by applications for the user. I do personaly keep home within the root-partition.
I get it. This is a reasonable course of action. I was just curious (like the proverbial cat) if creating users with different names will give them each it's own home folder and that would eliminate the risk of the internal settings of one user to interfere with the other. But maybe that is not possible.

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fehlix
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Re: Question about partitioning for a dual-boot install

#5

Post by fehlix » Fri Jan 25, 2019 6:41 pm

philotux wrote:
Fri Jan 25, 2019 6:31 pm
Thank you towwire and fehlix for the input!
fehlix wrote:
Fri Jan 25, 2019 6:15 pm
I do not recommend to share home, even not with mutiple MX installs.
Simple reason: user's home does not only contain data, but also a lot of internal settings used
by applications for the user. I do personaly keep home within the root-partition.
I get it. This is a reasonable course of action. I was just curious (like the proverbial cat) if creating users with different names will give them each it's own home folder and that would eliminate the risk of the internal settings of one user to interfere with the other. But maybe that is not possible.
For shared data folder , you would also check and verify the numerical user-id and group-id.
If you only have one user with MX and Manjato I think both user-id and group-id start with 1000 .
The name of the user for the share data is not important but the user-id/group-id.
So you can read write from both OSs documents and data.
If you have multiple user, you might create an additional shared-group and put all user into the same group etc.
Not difficult but some considiration are required....
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Re: Question about partitioning for a dual-boot install

#6

Post by philotux » Fri Jan 25, 2019 6:56 pm

Thanks again fehlix!

I will surely consider your suggestions when I proceed to the install proper. This could be a nice little project for this weekend. As mentioned before, the sole purpose of this install is to be able to experiment away more freely without the fear of breaking my day-to-day working system. Installing more software from testrepo and perhaps switching to Manjaro's testing branch is what I would like to try. It won't matter if something will break, since I think by trying to fix the issue, I will learn things that I wouldn't otherwise.

philotux
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Re: Question about partitioning for a dual-boot install

#7

Post by philotux » Fri Jan 25, 2019 9:21 pm

Just out of curiosity, could an EFI-partition be placed anywhere on the disk, even at the end of it?
Or just on another disk in a multi-disk system? SSD in this case if it makes a difference.

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Re: Question about partitioning for a dual-boot install

#8

Post by BitJam » Fri Jan 25, 2019 9:28 pm

philotux wrote:
Fri Jan 25, 2019 9:21 pm
Just out of curiosity, could an EFI-partition be placed anywhere on the disk, even at the end of it?
Yes. Although if you use msdos partitioning, you are limited to 2TB.
Or just on another disk in a multi-disk system? SSD in this case if it makes a difference.
Yes.
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philotux
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Re: Question about partitioning for a dual-boot install

#9

Post by philotux » Fri Jan 25, 2019 9:38 pm

Great, thanks a lot BitJam!

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