Attend XDA's Second Annual Developer Conference, XDA:DevCon 2014!
5,770,562 Members 37,649 Now Online
XDA Developers Android and Mobile Development Forum

【Urgent】SD card become read only under android

Tip us?
 
nighos
Old
(Last edited by nighos; 6th February 2011 at 12:05 PM.)
#1  
Senior Member - OP
Thanks Meter 3
Posts: 163
Join Date: Apr 2008
Default 【Urgent】SD card become read only under android

Urgent!!!
I don't know if this is a bug or not. I used to copy files by selecting the disk drive mode. After that I will safely remove the device under windows before disconnecting the usb cable.

The problem is sometimes after copying files to sdcard, the SD card will become read only under android. For example I cannot copy or create files using file explorer. When using camera app it says "Unable to save file to SD card due to insufficient file permissions". When using album it says "SD card unmounted or not present".

After the problem occurs I cannot access the SD card via disk drive mode anymore, unless I physically removed and reinsert back the SD card.

The strange thing is I can still access the SD card in PC via card reader with no problem. I can also view the existing files in the SD card under android (eg opening .apk in SD card)

I tried flashing the ROM for 2 times and with a different SD card. Also I formatted the SD using Panasonic SD formatter and partitioned properly. The problem still appear after several access under disk drive mode. Million thanks!!!
 
t3g
Old
#2  
Junior Member
Thanks Meter 0
Posts: 19
Join Date: Sep 2007
I've noticed the same thing in the DL DesireZ v3.3 nand ROM...
But now since I've switched to skink_Clean_Desire_v1.0 I don't have the problem any more...
No problem solver I know... but just to confirm the issue!

It was also read-only when I had disk drive mode chosen and connected to my win xp pc!
so when I deleted files over the computer they still existed...
I always remove the sd card securely!...

hope this helps a little bit!
 
voncrane
Old
#3  
Senior Member
Thanks Meter 83
Posts: 488
Join Date: Jul 2009
Location: Kuala Lumpur

 
DONATE TO ME
Memory cards get weak after awhile...Had d same issue with a Memory card...it works well on WinMo but messes up just as u described in android after a format n a few read & writes...Froyo has also been reported to ruin memory cards...Summary, there's no real solution as i've googled all over....My advice is for you 2 get a new memory card, capacity & class (d higher d number, d better its read & write speed) is up to you...I'm using a class (4) 8GB card n its been alright.
P.S. Stop transferring files via d disk drive option in android..stick to using memory card readers or d MAGDLR function (though some also report file errors with dis).
Samsung Galaxy Note III (SM-N9005)
Build > Stock 4.4.2 (Rooted)
Build Number > KOT49H.N9005XXUENC2
Baseband Version > N9005XXUENC2
Recovery > Latest TWRP
Kernel Version > 3.4.0-636608 (Default)

Google Nexus 10
Build > Stock 4.4.2 (Rooted)
Build Number > KOT49H
Recovery > Latest TWRP
Kernel > 3.4.39-g5b5c8df (Default)

>>> Hit the Thanks Button <<<
 
nighos
Old
(Last edited by nighos; 6th February 2011 at 01:42 PM.)
#4  
Senior Member - OP
Thanks Meter 3
Posts: 163
Join Date: Apr 2008
Quote:
Originally Posted by voncrane View Post
Memory cards get weak after awhile...Had d same issue with a Memory card...it works well on WinMo but messes up just as u described in android after a format n a few read & writes...Froyo has also been reported to ruin memory cards...Summary, there's no real solution as i've googled all over....My advice is for you 2 get a new memory card, capacity & class (d higher d number, d better its read & write speed) is up to you...I'm using a class (4) 8GB card n its been alright.
P.S. Stop transferring files via d disk drive option in android..stick to using memory card readers or d MAGDLR function (though some also report file errors with dis).
Thanks for your reply
But how come windows and wm can read and write normally but it doesn't work in android?

Also, I have been using NAND and its disk drive option to transfer file in Cotulla's desire stock Rom and there is no problem at all. Would the problem be related to app2sd since the card has a ext4 partition?
 
victortan001
Old
#5  
Junior Member
Thanks Meter 0
Posts: 3
Join Date: Oct 2010
do a chkdsk on your micro-sd card. let it repair and then don't delete the LOST folder in your sd card. ^^ you will be able to mount as read/write after this
 
voncrane
Old
#6  
Senior Member
Thanks Meter 83
Posts: 488
Join Date: Jul 2009
Location: Kuala Lumpur

 
DONATE TO ME
Quote:
Originally Posted by victortan001 View Post
do a chkdsk on your micro-sd card. let it repair and then don't delete the LOST folder in your sd card. ^^ you will be able to mount as read/write after this
Try a chkdsk as well...But in my experience, i did it several times & it only acted as a band-aid...As it reverts to read only ltr on...
Samsung Galaxy Note III (SM-N9005)
Build > Stock 4.4.2 (Rooted)
Build Number > KOT49H.N9005XXUENC2
Baseband Version > N9005XXUENC2
Recovery > Latest TWRP
Kernel Version > 3.4.0-636608 (Default)

Google Nexus 10
Build > Stock 4.4.2 (Rooted)
Build Number > KOT49H
Recovery > Latest TWRP
Kernel > 3.4.39-g5b5c8df (Default)

>>> Hit the Thanks Button <<<
 
nighos
Old
#7  
Senior Member - OP
Thanks Meter 3
Posts: 163
Join Date: Apr 2008
Quote:
Originally Posted by voncrane View Post
Try a chkdsk as well...But in my experience, i did it several times & it only acted as a band-aid...As it reverts to read only ltr on...
So is this a SD card problem or ROM problem?
Previously I had been using Cotulla Desire stock Rom for a month and the problem didn't exist.

I don't mind buying a new SD card if it can completely solve the problem. Thanks

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Navigate to Your Favorite Places with LocationDetector

If you’re enjoying an active way of life, you probablytravel a lot, go fishing, … more

LifeStats Automatic Journal Keeps Tabs of Your Day

Most of us live very active lives. This is after all why we’re fans of mobile … more

Android App Review: Hide Your Files with Androignito – XDA Developer TV

Stop right now, look at your phone, and see how many pictures, … more

BrightNotes Makes Cloud Notes Simple and Easy

There are literally thousands of note taking apps available on Android, with practically every … more