# AR750 - SD card with ext4 and NTFS partition **URL:** \ **Category:** Router\ **Created:** [June 5, 2020, 9:01am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024 "2020-06-05T09:01:15Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 5, 2020, 9:01am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/1 "2020-06-05T09:01:15Z")
Hi all, my SD (16GB) is formatted with two partition like the subject. ext4 is used for extroot (3GB) and i can see it, NTFS for data/backup, but i can’t see it: ![image](https://forum-static.gl-inet.com/original/2X/7/7ea23b14143c3f5a67a5ffd9d32b6ac49f15ebaa.png) can see only here: ![image](https://forum-static.gl-inet.com/original/2X/1/1f355556a511aebade3f1bb3b0f519e2afe2ae4d.png) suggestion? thanks ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 5, 2020, 10:08am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/2 "2020-06-05T10:08:02Z")
SOLVED: I had to mount: 1. get information with blkid command 2. insert this string in /etc/fstab: UUID= \< what i got from blkid \> /mnt/NameDirectoryToMount ntfs defaults 0 0 3. mount /dev/DiskLabel /mnt/NameDirectoryToMount -o rw now it appears: ![image](https://forum-static.gl-inet.com/original/2X/2/2caa853401fb5dd051b8774f001f086d0ba6cbbd.png) ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 8, 2020, 2:06pm UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/3 "2020-06-08T14:06:56Z")
Just noticed that after reboot i lost my configuration in /etc Anyone can help me? ![image](https://forum-static.gl-inet.com/original/2X/e/ee47538bb4322a86705431314e2c76817e75b98f.png) ---
**Author:** ![alzhao](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@alzhao](https://forum.gl-inet.com/u/alzhao)\ **Post date:** [June 9, 2020, 8:45am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/4 "2020-06-09T08:45:48Z")
when you reboot, do a “sync” first. This force writing all buffer to disk. Just type the command in shell. ```auto sync ``` ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 9, 2020, 9:50am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/5 "2020-06-09T09:50:33Z")
doesn’t work. After reboot my AR750 continue to ignore my edit to smb.conf and doesn’t mount my partition on fstab: ![image](https://forum-static.gl-inet.com/original/2X/b/be601575acb4d2e6eed1e8eeed55573657552341.png) ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 9, 2020, 10:46am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/6 "2020-06-09T10:46:05Z")
i tried from gui too: ![image](https://forum-static.gl-inet.com/original/2X/4/436d5e1d436e726d327bcae49bf2a92c1e1b743a.png) ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 9, 2020, 6:31pm UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/8 "2020-06-09T18:31:58Z")
getting crazy! lost my life editing /etc/fstab but real file for working changes is /etc/config/fstab madness with extroot ---
**Author:** ![alzhao](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@alzhao](https://forum.gl-inet.com/u/alzhao)\ **Post date:** [June 10, 2020, 9:00am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/9 "2020-06-10T09:00:54Z")
I understand. It is not a problem of exroot. It is openwrt. For example, you cannot modify smb.conf because it is dynamically generated. You need to modify smb.conf.template instead. The same for fstab. ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 10, 2020, 10:21am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/10 "2020-06-10T10:21:41Z")
perhaps maybe this might help? > [@How can I disable USB sharing on my MT300N-V2?](https://forum.gl-inet.com/t/how-can-i-disable-usb-sharing-on-my-mt300n-v2/5514/7): > > You should Remove 50-samba ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 10, 2020, 10:29am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/11 "2020-06-10T10:29:39Z")
In vanilla openwrt I use extroot and create 2 ext4 partitions. usually first one between 1 and 2 gigs depending on extcard size and mount it to /overlay. the second I mount to /mnt/sda2/. with gl-config it always mounts to the partion label names automatically and on hotplug for non permanant drives. so with extroot in mounts 1st partion. after booting you then have to set another mount for second partition. one way I do it. prolly more than one way to mount a drive but for I while I too fell into a trap of doing it wrong. ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 11, 2020, 2:07pm UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/12 "2020-06-11T14:07:13Z")
no way to solve, this is the situation etc/config/fstab ![image](https://forum-static.gl-inet.com/original/2X/f/f83cd51a521411757e2fb86a2ec7bbc0ea0040f1.png) /etc/fstab ![image](https://forum-static.gl-inet.com/original/2X/7/7cb382114b4057a26b62187ae4f667fee3ed4a1a.png) always mount this mount ![image](https://forum-static.gl-inet.com/original/2X/c/ce0c62dda940ce0c85199c4a1d7e0962fd4d7a4b.png) mtab empty. 3days working all day and no solution ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 12, 2020, 2:38am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/13 "2020-06-12T02:38:22Z")
1. pull usb thumb drive and reboot. verifiy you or only mounting the single partition of /overlay at boot. (it will be unmounted because device is not pretent). delete other mounts leaving overlay. powerdown instert usb and reboot extroot. and verify uuid is pointing to correct partion. if not delete all and point to /dev/sda2 and make sure directory /mnt/sda2 is already created and empty in openwrt (umount /dev/sda2) 2. since windows cannot see ntfs partions on a drive past the first ext4 ntfs may be corrupted and need to to fix it other than with windows? ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 12, 2020, 2:42am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/14 "2020-06-12T02:42:48Z")
so I’m thinking? why use ntfs on thumb drive? my bad. I’m thing all is on one drive. ntfs partition is on /dev/sdb\* correct? ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 12, 2020, 7:08am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/16 "2020-06-12T07:08:37Z")
when i mount with mount -a everything working fine, i can see ntfs partition from my windows pc and from my raspberry so the problem is on boot i’'d like to know in which file the router takes this output, overriding all fstab files [![](https://forum-static.gl-inet.com/original/2X/c/ce0c62dda940ce0c85199c4a1d7e0962fd4d7a4b.png) ](https://forum-static.gl-inet.com/original/2X/c/ce0c62dda940ce0c85199c4a1d7e0962fd4d7a4b.png) ![image](https://forum-static.gl-inet.com/original/2X/6/65b780e36b96aeba41a507f0299050a1fb8e0c36.png) ![image](https://forum-static.gl-inet.com/original/2X/c/c7e45f7b5cfb23654ce057b7fb6c67927ffecbc9.png) ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 12, 2020, 8:55am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/17 "2020-06-12T08:55:36Z")
ext4 is booted in exteneded partition?. I always use a prmary partion and always the first partion. what os did you use to format ntfs or what version. ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 12, 2020, 9:13am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/18 "2020-06-12T09:13:58Z")
maybe that’s the problem? can i flag sda5 as primary? I format SD card on my windows pc by minitool partition wizard ---
**Author:** ![rp201rp](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@rp201rp](https://forum.gl-inet.com/u/rp201rp)\ **Post date:** [June 12, 2020, 10:07am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/19 "2020-06-12T10:07:28Z")
I don’t believe so that’s in the partion table. perhaps you can backup the data and delete extended partion and reformat as ext4 primary. you will also need windows software in windows for mounting under windows or if you use linux it shouldn’t be a problem so long as both support writing to ntfs and not read only to ntfs. ---
**Author:** ![gaboIT](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/gaboit/32/29962_2.png) [@gaboIT](https://forum.gl-inet.com/u/gaboIT)\ **Post date:** [June 12, 2020, 8:21pm UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/20 "2020-06-12T20:21:12Z")
getting crazy again, but…SOLVED! i tried everything, formatted again to get sda5 label, tried over 1000+ options in /etc/config/fstab, tried also the official guide [[OpenWrt Wiki] Writable NTFS](https://openwrt.org/docs/guide-user/storage/writable_ntfs) but the only solution to automount NTFS with write permission is this: > **[How to configure auto-mounting\\auto-stop USB-HDD like in LEDE?](https://forum.openwrt.org/t/how-to-configure-auto-mounting-auto-stop-usb-hdd-like-in-lede/26180/11)** > > Hi. I solve my problem. Solution found in this topic: Once kmod-fs-ntfs exists, ntfs-3g doesn't work. So just remove kmod-fs-ntfs. and reboot router! Now USB-HDD is readwrite mode and successfuly automounting after plugging: ... now after reboot: ![image](https://forum-static.gl-inet.com/original/2X/3/31cf4b6af118b344f5ac0034a24784cc899c0b2e.png) so… package conflict… just madness again hope this help in the future thanks all ---
**Author:** ![bruce](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/bruce/32/35649_2.png) [@bruce](https://forum.gl-inet.com/u/bruce)\ **Post date:** [October 29, 2025, 4:10am UTC](https://forum.gl-inet.com/t/ar750-sd-card-with-ext4-and-ntfs-partition/11024/22 "2025-10-29T04:10:46Z")