internal sd card became readonly

after updation of lolypop with cwm 12.1 nightly on SAMSUNG GT-9100 , internal sd card became read only.... cant delete ant of he media from internal sd....but a option was seen..when applications are loading after boot...a time window is there allowing to edit media for 10-12 seconds... as soon as all are loaded it turns ibnto readonly... a member sugested me to load kernal...but i nearly got lost on internet looking for one..as every link provided by sources further provide more links....... plz plz help me out.... its a requet as i use phn for surfing and learing new things and to get knowledge..am not in condition to buy a new phn ..so its a humble request to respected members to guide me and help me out...thanks in advance

Internal Storage Read-Only

I was trying to unroot my M8 and get it back as stock as possible and tried different things. I was gonna do the unroot step using the CM12s_apps.zip when I noticed I couldn't do anything with the internal storage. It was giving me an error of insufficient storage or that the storage was in a read-only mode. I think I messed up permissions or something. I can't even take a screenshot because of this problem. I also tried recovering from a backup but it didn't fix anything. Any ideas?

GSII: Internal storage became read-only

Hello,

I have Samsung Galaxi S II GT-I9100
Android version 4.1.2
I got root access, CWM and SSH server installed.

Recently I tried to download an audio file over 3G. The download couldn't be completed and after then I wouldn't be able to download any file. I discovered I could also not delete any file from my internal storage which is sdcard0.
When I tried to change permissions on sdcard0 using SSH I typed:

Code:

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chmod -R 777 sdcard0

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and got this:

Code:

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chmod: sdcard0: Read-only file system

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Please help :) would be much appreciated.
Thanks in advance!