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【Urgent】SD card become read only under android

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nighos
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(Last edited by nighos; 6th February 2011 at 12:05 PM.)
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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
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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
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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 S III
Build > Stock 4.1.2
Modem > I9300DXELK1
Build Number > XXEMA2
Kernel > Default

Samsung Galaxy Tab 10.1 (P7500)
Build > Stock Android 4.0.4 (Rooted)
Recovery > v6.0.3.2
Kernel > Default

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nighos
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(Last edited by nighos; 6th February 2011 at 01:42 PM.)
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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
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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
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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 S III
Build > Stock 4.1.2
Modem > I9300DXELK1
Build Number > XXEMA2
Kernel > Default

Samsung Galaxy Tab 10.1 (P7500)
Build > Stock Android 4.0.4 (Rooted)
Recovery > v6.0.3.2
Kernel > Default

>>> Hit the Thanks Button <<<
 
nighos
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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

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