Re: exfat on SD card getting mounted read-only

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I did add the word "exfat" to my original search line and results are different but none seem on the mark.

Search term " sd exfat card will mount only read only fedora 20 "

Perhaps time to start looking at how other machines see the card - and how other cards work formatted as you like in your affected Fedora machine.  A theme I seem to see is that not all cards work with all readers in all computers running all OS's.  Oh - how could this be?!?


On Mon, Aug 25, 2014 at 8:54 PM, Tod Merley <todbot88@xxxxxxxxx> wrote:
My card is a Samsung 32 EVO Micro SD HC I held in an SD adapter and used and formatted by my Nikon camera.

[tmerley@localhost ~]$ journalctl -f
-- Logs begin at Mon 2014-08-25 06:16:28 PDT. --
Aug 25 20:28:07 localhost.localdomain dhclient[1015]: ...
... ... [starting line just before SD card plugged in] ...
Aug 25 20:23:00 localhost.localdomain gnome-session[1411]: Window manager warning: Log level 8: meta_window_focus: assertion '!window->overr... failed
Aug 25 20:24:27 localhost.localdomain kernel: mmc0: cannot verify signal voltage switch
Aug 25 20:24:27 localhost.localdomain kernel: mmc0: new ultra high speed SDR50 SDHC card at address 0001
Aug 25 20:24:27 localhost.localdomain kernel: mmcblk0: mmc0:0001 00000 29.2 GiB 
Aug 25 20:24:27 localhost.localdomain kernel:  mmcblk0: p1
Aug 25 20:24:28 localhost.localdomain kernel: SELinux: initialized (dev mmcblk0p1, type vfat), uses genfs_contexts
Aug 25 20:24:28 localhost.localdomain udisksd[1516]: Mounted /dev/mmcblk0p1 at /run/media/tmerley/NO_NAME on behalf of uid 1000
Aug 25 20:25:08 localhost.localdomain NetworkManager[640]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted
... [ending one line after SD card plugged in] ...
... [unmount remove re-insert] ...
Aug 25 20:42:54 localhost.localdomain udisksd[1516]: Cleaning up mount point /run/media/tmerley/NO_NAME (device 179:1 is not mounted)
Aug 25 20:42:54 localhost.localdomain udisksd[1516]: Unmounted /dev/mmcblk0p1 on behalf of uid 1000
Aug 25 20:43:32 localhost.localdomain kernel: mmc0: card 0001 removed
Aug 25 20:43:36 localhost.localdomain kernel: mmc0: cannot verify signal voltage switch
Aug 25 20:43:36 localhost.localdomain kernel: mmc0: new ultra high speed SDR50 SDHC card at address 0001
Aug 25 20:43:36 localhost.localdomain kernel: mmcblk0: mmc0:0001 00000 29.2 GiB 
Aug 25 20:43:36 localhost.localdomain kernel:  mmcblk0: p1
Aug 25 20:43:36 localhost.localdomain kernel: SELinux: initialized (dev mmcblk0p1, type vfat), uses genfs_contexts
Aug 25 20:43:36 localhost.localdomain udisksd[1516]: Mounted /dev/mmcblk0p1 at /run/media/tmerley/NO_NAME on behalf of uid 1000


[tmerley@localhost ~]$ dmesg
... ...
[  202.037022] mmc0: cannot verify signal voltage switch
[  202.134193] mmc0: new ultra high speed SDR50 SDHC card at address 0001
[  202.160009] mmcblk0: mmc0:0001 00000 29.2 GiB 
[  202.163517]  mmcblk0: p1
[  203.258077] SELinux: initialized (dev mmcblk0p1, type vfat), uses genfs_contexts

[tmerley@localhost ~]$ mount
... ...
/dev/mmcblk0p1 on /run/media/tmerley/NO_NAME type vfat (rw,nosuid,nodev,relatime,uid=1000,gid=1000,fmask=0022,dmask=0077,codepage=437,iocharset=ascii,shortname=mixed,showexec,utf8,flush,errors=remount-ro,uhelper=udisks2)


On Mon, Aug 25, 2014 at 7:58 PM, jd1008 <jd1008@xxxxxxxxx> wrote:

On 08/25/2014 08:40 PM, Ed Greshko wrote:
On 08/26/14 03:15, jd1008 wrote:
My flash card slot in the laptop is (per lspci):
03:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21)

I insert into it a SanDisk 16GB Extreme SD card. This card is not marked as a secure card.
At least, it does not say so on the card.

It gets automounted read only as:

/dev/mmcblk0p1 on /run/media/jd/3D90-BEAB type fuseblk (ro,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)

# umount -f /dev/mmcblk0p1

# /sbin/mount.exfat -o rw /dev/mmcblk0p1 /mmcblk0p1
FUSE exfat 1.0.1
WARN: `/dev/mmcblk0p1' is write-protected, mounting read-only.

So, what is causing it to be mountable read-only, and not get mounted read/write?
Did you format your card using the RPMfusion exfat-utils or did you do it on Windows?  Whichever way you did it, you can try the other way.  If that doesn't work, you may want to ask on the RPMFusion list and/or file a bugzilla there.

If I recall correctly, I had indeed originally formatted it as exfat on windows.
But after that I was found the rpmfusion exfat-utils and installed them on my fc20.



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