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Old 03-07-2016, 05:24 AM   #1
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Independence of logical volumes in dual boot laptop with Debian 8.3.0 and Windows 7


I recently bought an MSI laptop and configured it for dual boot with Windows and Debian. The hard disk contains

- 1 primary partition for Windows 7 SP1 Professional
- 1 primary partition for Debian 8.3.0
- 1 primary partition set by MSI with drivers, which I chose not to erase
- 1 extended partition with 1 logical volume for swap and 1 for storage (ntfs)

I have placed the storage in a separate partition so both OSs can see it. It works but I noticed inconsistencies between the disk management utility of Windows and gparted. I used gparted to create the extended partition, but Windows for some reason sees the swap volume as a primary partition. Also I needed to reformat the storage volume because I couldnīt mount it the first time due to a "missing NTFS signature". After reformatting it with gparted it became visible to both OSs.

Since I donīt have experience with partitioning, I am not confident with swap and storage sharing the same extended partition. I wouldnīt want Windows to mess with my swap space in the future. Are logical volumes in an extended partition as independent as primary partitions? I considered moving storage to a primary partition and Linux with all its files in an extended, which is easy now that the system is clean. Do you think it is worth it? Unfortunately I am not close to my laptop to post screenshots and command results, but I hope my question has a simple quick answer. I can post more information later if needed.

Thank you for your time

edit: hmm I realized I should have posted this in the General forum.. sorry for the muddle :/

Last edited by pushpull; 03-07-2016 at 05:36 AM.
Old 03-07-2016, 07:41 AM   #2
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if I understand it well this is the right way. Just only that is not logical volume but partition.
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Old 03-07-2016, 08:09 AM   #3
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This is exactly the way my laptop is setup and I've been running this way for years and years with no issues.

Logical partitions in the extended partition are just partitions, functionally. Windows should ignore the swap partition entirely unless you mess with it in the disk management app.

also, if your disk happens to be using a gpt partition table (many modern pc come this way) rather than an msdos partition table, then the 4 primary partition limit does not apply anyway.
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Old 03-07-2016, 10:27 AM   #4
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Ahh I see, perfect
Yes, with logical volumes I meant logical partitions.
Thank you very much for your answers!


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