Jolla made my sdcard read only! 0o

asked 2014-07-14 21:03:01 +0200

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updated 2014-07-14 21:03:01 +0200

Kollin gravatar image

Jolla made my sdcard read only some how! Nothing helps. Fdisk is useless, cgdisk, parted are useless also! Trying to format the card with another PC does nothing! WTF is going on? And it seems i'm not the only one:

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Did you change filesystem or partition structure on the sdcard? Read only mode can be a vendor set system to prevent loosing data when the card goes bad. The reason for this could a be badly aligned partition in relation to the card's internal logic. This would cause extra wear.

Manatus ( 2014-07-15 00:19:33 +0200 )edit

cgdisk does nothhing, aligning, formatting, fs changing-nothing seems to work!

Kollin ( 2014-07-15 00:32:32 +0200 )edit

As a last resort i even tried windows! 4 hours ntfs full format and still nothing!

Kollin ( 2014-07-15 10:47:03 +0200 )edit

What I meant is that you may have already "burnt" your sdcard by using it with a partition scheme that was not supported by the vendor. If the partition is not aligned to the sdcard cells/blocks correctly, every single write operation may cause multiple wipes and rewrites on the sdcard.

You can try sdcard.orgformatter. It should be able to format and repartition your card to the original partition scheme and filesystem (exFAT I presume). Unless it is too late.

In the future you should not format the whole device (/dev/mmcblk1) and/or remove and recreate partition boundaries manually. Only use the partition table set at factory, eg. the same sdcard formatter tool creates (/dev/mmcblk1p1).

Many tutorials throughout the internet and here at tjc do not take this into account when they advise people to format the whole card. I'm not 100% certain about this either, since not everybody have problems, but it is best to be careful.

Manatus ( 2014-07-15 17:47:37 +0200 )edit

Thank you, i'll try your method!

Kollin ( 2014-07-16 00:34:31 +0200 )edit