FrankCP
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Joined: Tue Oct 03, 2017 12:52 pm

NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 4:39 pm

I plugged a NOOBS formatted SD card into my Windows 10 machine to make a backup image, and lo-and-behold, every partition on the card mounted in Windows, even the ext4 partitions.

What magic does NOOBS now put on the card that makes this happen? I've never plugged a drive or card into my Windows machine before and seen ext4 partitions mount natively like that; I usually need to run ext2fs and manually mount them. I tried a USB drive with Fedora ext4 partitions on it and as usual it just sat there with nothing mounted.

DirkS
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Location: Essex, UK

Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 4:49 pm

You can see any partition in Windows 10, but AFAIK you can not access them.
I get a message that these partitions cannot be accessed and need formatting.

It's an annoying new feature in Windows 10.

FrankCP
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Joined: Tue Oct 03, 2017 12:52 pm

Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 4:52 pm

Nope, with the latest NOOBS, the ext4 partitions it created mount, are assigned drive letters, and CAN be accessed in Windows (not writable, but readable). It was not always so. This is the miracle to which I refer.
Last edited by FrankCP on Thu Oct 12, 2017 5:04 pm, edited 1 time in total.

procount
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Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 4:58 pm

I don't think there is anything different in the latest NOOBS to facilitate this.
More likely that a recent upgrade to Win10 has enabled ext4 support.
I understand MS is including more Linux support from Canonical eg. Bash shell support.
I don't have Win10 so I can't be sure.
PINN - NOOBS with the extras... https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=142574

FrankCP
Posts: 7
Joined: Tue Oct 03, 2017 12:52 pm

Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 5:08 pm

Well, I have an older Pi with an older NOOBS formatted card. When I get a chance, I'll power that down, pull out the card and try it in the Windows machine. I bet the ext4 partitions won't mount, but I'll reserve judgement until I try it. That card's been in the Windows machine before for backup and never exhibited this behavior. I'll report back.

There's no Windows 10 chatter that any ext4 support may have been added.

beta-tester
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Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 5:15 pm

do you have the windows 10 with the windows linux (beta) feature installed?
Last edited by beta-tester on Thu Oct 12, 2017 5:35 pm, edited 2 times in total.
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DirkS
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Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 5:20 pm

beta-tester wrote:
Thu Oct 12, 2017 5:15 pm
do you have the windows 10 with the windows linux (beta) feature installed?
I have and I get the situation as I posted above: see them, but no access.

FrankCP
Posts: 7
Joined: Tue Oct 03, 2017 12:52 pm

Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 5:22 pm

I do have the "Bash on Ubuntu on Windows" feature installed. I had been thinking this might be related, but there isn't any chatter on the internet that this feature gives Windows native ext4 read support either.
Last edited by FrankCP on Thu Oct 12, 2017 5:27 pm, edited 1 time in total.

beta-tester
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Re: NOOBS formatted SD card: ext4 partitions mount automatically in Windows!

Thu Oct 12, 2017 5:25 pm

in windows version 10 (1703) this feature is marked as (beta)
in windows 10 (1709) build 16299.15 there it is not marked as beta anymore (currently only available as windows 10 insider preview)
{ I only give negative feedback }
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FrankCP
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Joined: Tue Oct 03, 2017 12:52 pm

Mystery is probably solved.

Thu Oct 12, 2017 6:12 pm

Ok, I think the mystery is solved. ext2fsd apparently has a background service that is doing this automatically. Since it has never done this for me on any other drives with ext4 filesystems (I always have to bring up Ext2fsd and manually assign a drive letter), I didn't realize it had the ability to mount partitions automatically. Imagine my amazement.

Something about this NOOBS-formatted Pi card made ext2fsd want to mount them all automatically. I tried the older NOOBS-formatted card and one ext4 partition WAS mounted automatically, while another one came up as unformatted! Totally inconsistent.

Sorry if I got anybody's hopes up.
Thanks for all the help.

beta-tester
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Location: de_DE

Re: Mystery is probably solved.

Thu Oct 12, 2017 7:56 pm

i enabled that feature in windows 1709 build 16299.15 now,
but then i saw your post, that it only was your additional driver that lets the ext4 partition mounted automatically to windows 10...
(you got me)

yes, it is still not possible to mount ext4 with only the windows subsystem for linux enabled... :(
(even that feature is not marked as beta anymore)

then that feature is totally useless to me.
{ I only give negative feedback }
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DougieLawson
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Re: Mystery is probably solved.

Sat Oct 14, 2017 8:12 pm

FrankCP wrote:
Thu Oct 12, 2017 6:12 pm
Ok, I think the mystery is solved. ext2fsd apparently has a background service that is doing this automatically. Since it has never done this for me on any other drives with ext4 filesystems (I always have to bring up Ext2fsd and manually assign a drive letter), I didn't realize it had the ability to mount partitions automatically. Imagine my amazement.
ext2fsd is not a standard part of Microsoft Win10. It's an add-on you've installed from Sourceforge.
http://www.ext2fsd.com
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