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Cannot mount SDXC card [answered]

asked 2014-09-25 01:10:40 +0200

spetsnaz gravatar image

updated 2014-12-05 22:29:47 +0200

pulsar gravatar image

I have a 64-bit SDXC card that is formatted to exFAT. When I got to reformat through Windows, the only option open to me is NTFS or exFAT, both of which I understand to be no good. I have tried to format the card through the phone itself with the following command.

mkfs.ext4 /dev/mmcblk1p1

Unfortunately I get this error.

permission denied while trying to determine filesystem size

Can someone help?

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The question has been closed for the following reason "the question is answered, an answer was accepted" by olf
close date 2018-03-05 17:16:07.734023


Become root via devel-su first, before issuing an mkfs command!

See also "[How-to] Creating partitions on SD-card, optionally encrypted" for a comprehensive guide.

olf ( 2018-03-05 17:15:09 +0200 )edit

4 Answers

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answered 2014-09-25 11:44:03 +0200

aegis gravatar image

You can format the card as FAT32 still on Windows but only from the command prompt.

This article at wikihow explains... http://m.wikihow.com/Format-FAT32

Apart from the 4GB maximum file size FAT32 has the advantage of working pretty much anywhere.

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In the end i just formatted as Fat32 and it worked fine.

spetsnaz ( 2014-09-26 11:51:54 +0200 )edit

answered 2015-06-20 07:31:08 +0200

DrYak gravatar image

Regarding exFAT and NTFS

exFAT FUSE drivers are now available on the openrepos (and thus through WareHouse) :

in BloodyFoxy's repository.

And I have myself compiled ntfs-3g

in my repo

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answered 2015-06-20 08:33:28 +0200

V10lator gravatar image

Fuse is slow, fat doesn't support files >4gb. So your best bet is to use ext4 or btrfs. The command you used is good but permission denied means you tried it as nemo. Next time use devel-su to get root rights. :)

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answered 2014-09-25 09:06:51 +0200

Whippler gravatar image

Your best bet to format it to fat32 would be this little software for windows http://en.softonic.com/s/gui-format-fat32-download

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Asked: 2014-09-25 01:10:40 +0200

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Last updated: Jun 20 '15