📎 AI Summary:
The thread discusses plans to convert data drives from primary to logical partitions without data loss, with the original poster concerned about how partition types (MBR vs GPT) affect this process. A respondent clarifies that Windows requires a primary partition for the OS and that on GPT drives, the first partition must be primary, while logical partitions are more relevant on MBR disks with extended partitions. Overall, the conversation highlights the differences between MBR and GPT partition schemes and their impact on drive configuration, with the main concern about maintaining data integrity during partition type conversions.

voyager

Extraordinary Member
Joined
Jun 8, 2010
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46
Thread Author #1
I am in the process of cleaning and neatening up my PC.

My PC has 6 drives:
(C:) - Primary - M.2 - 1TB O.S. Drive - 3 Win Install partitions
(D:) - Primary - SSD - 1TB Installation Drive - 1 Partition
(E:) - Primary - HDD - 2TB Data Drive - 1 Partition
(F:) - Primary - HDD - 2TB Data Drive - 1 Partition
(G:) - Primary - HDD - 4TB Data Drive - 1 Partition
(H:) - Logical - HDD - 2TB Data Drive - 1 Partition

C: & D: need to be Primary & Active because of the OS and installed applications.

My conceen is with drives (E:), (F:) and (G:).
They're DATA drives and have no need to be active primary drives or partitions.
I would like to convert them to being logical, but worry about DATA loss.

Can they be converted to logical without DATA loss?
An image from 'My PC has 6 drives'. Disk Management showing multiple NTFS partitions across seven disks, all healthy.
 

Last edited by a moderator:
Solution
Untrue, malware can just as easily install on any of those drives and run; however, most malware generally installs in well-known locations. The only meaningful reason to use primary vs logical is that Windows needs to be installed on a primary partition.

Neemobeer

Windows Forum Team
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There is literally no reason to covert them to logical drives.
 

voyager

Extraordinary Member
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Jun 8, 2010
Messages
46
Thread Author #3
I see that there is.
A primary drive/partition can be made active, which these already are.
Which tells me that actions can be initiated from them as in drives C: and D:, by installed apps.
By everything as I understand, malware and other things could be installed there and be active.
If they're logical they should be inert.
 

Neemobeer

Windows Forum Team
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Messages
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Untrue, malware can just as easily install on any of those drives and run; however, most malware generally installs in well-known locations. The only meaningful reason to use primary vs logical is that Windows needs to be installed on a primary partition.
 

Solution

voyager

Extraordinary Member
Joined
Jun 8, 2010
Messages
46
Thread Author #5
OK, I think I may be beginning to understand why I'm having so much trouble trying to convert drives E/ thru G/ to being Logical drives.

MBR drives, D/: and H/: can have both primary and logical partitions.
C/:, E/:, F/:, and G/: are GPT drives.
Their 1st partition must be primary.
C/: requires primary because of the OS.
I set D/: as primary because of plans to install applications there rather than on C/:.
E/:, F/:, and G/: have a single partition and are GPT.
H/: is MBR allowing it to have its single partition to be logical.
Don't know how clear that is to everyone else, but I understand it.

I may not like it.
But, I now understand that's how the world works.
 

Neemobeer

Windows Forum Team
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Messages
8,995
Having an extended partition allows you to create 1 or more logical partitions, this was/is a way to overcome the 4 partition limit on an MBR disk. GPT can handle 128 partitions so doesn't have the limitation and no reason for having logical partitions.