Jffs2: Erase at 0x00020000 failed immediately: -EROFS. Is the sector locked?

Model Newifi-D2
Architecture MediaTek MT7621 ver:1 eco:3
Firmware Version OpenWrt SNAPSHOT r12066-97a03a4 / LuCI Master git-20.021.30115-71743a7
Kernel Version 4.14.166
Local Time 2020-01-23 05:41:20

Filesystem Size Used Available Use% Mounted on
/dev/root 3.8M 3.8M 0 100% /rom
tmpfs 250.4M 876.0K 249.6M 0% /tmp
tmpfs 250.4M 21.2M 229.2M 8% /tmp/root
overlayfs:/tmp/root 250.4M 21.2M 229.2M 8% /
tmpfs 512.0K 0 512.0K 0% /dev
/dev/mtdblock6 26.1M 26.1M 0 100% /rom/overlay

Tue Jan 21 10:52:42 2020 kern.warn kernel: [   43.348947] jffs2: Erase at 0x00020000 failed immediately: -EROFS. Is the sector locked?
Tue Jan 21 10:52:42 2020 kern.warn kernel: [   43.357053] jffs2: Erase at 0x00010000 failed immediately: -EROFS. Is the sector locked?
Tue Jan 21 10:52:42 2020 kern.warn kernel: [   43.365131] jffs2: Erase at 0x00000000 failed immediately: -EROFS. Is the sector locked?
Tue Jan 21 10:52:42 2020 kern.warn kernel: [   43.373230] done.
Tue Jan 21 10:52:42 2020 kern.notice kernel: [   43.375206] jffs2: notice: (1397) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
Tue Jan 21 10:52:42 2020 daemon.notice procd: /etc/rc.d/S95done: cp: can't create directory '/rom/overlay/upper': No space left on device
Tue Jan 21 10:52:42 2020 daemon.notice procd: /etc/rc.d/S95done: cp: can't create directory '/rom/overlay/work': No space left on device

It was "fixed" in https://github.com/openwrt/openwrt/commit/0c707d37b7f767daca655e02558299fe100fd3f7

-- ynezz

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