How can I repair [android_meta] and [android_expand] partitions?
Posted: 27 Nov 2021, 14:14
I had installed a Kingston 32GB SD as memory expansion into a Blackview 6300 mobile - Android 10 afaik.
After hard mechanic shock (presumably), I got the message "SD-Karte beschÃĪdigt" - means "SD card is damaged".
For rescue, I mounted the card to my debian 10 and performed a ddrescue backup.
testdisk (7.0 debian stock) finds
Since I could read some files, I applied the changes.
Was able to mount the remaining single partition in debian.
Plugging the card back to my mobile, it is identified as "mobile storage", the SD-Extension is marked as "missing".
A number of apps are not available any more.
It appears to me like I had removed some kind of advanced Android partition format relating to memory extension and converted the SD to a bare data storage.
Can I revert this? ddrescue?
And how can I fix the damaged [android_meta] and [android_expand], after all?
After hard mechanic shock (presumably), I got the message "SD-Karte beschÃĪdigt" - means "SD card is damaged".
For rescue, I mounted the card to my debian 10 and performed a ddrescue backup.
testdisk (7.0 debian stock) finds
Code: Select all
Current partition structure:
1 P Unknown 2048 34815 32768 [android_meta]
2 P Unknown 34816 60751838 60717023 [android_expand]
search_part()
Disk /dev/sdc - 31 GB / 28 GiB - CHS 29664 64 32
FAT32 at 4/0/1
FAT1 : 1556-8969
FAT2 : 8970-16383
start_rootdir : 16384 root cluster : 2
Data : 16384-60743679
sectors : 60743680
cluster_size : 64
no_of_cluster : 948864 (2 - 948865)
fat_length 7414 calculated 7414
heads/cylinder 255 (FAT) != 64 (HD)
sect/track 63 (FAT) != 32 (HD)
set_FAT_info: name from BS used
FAT32 at 4/0/1
MS Data 8192 60751871 60743680
FAT32, blocksize=32768, 31 GB / 28 GiB
Results
P MS Data 8192 60751871 60743680
FAT32, blocksize=32768, 31 GB / 28 GiB
[...]
interface_write()
1 P MS Data 8192 60751871 60743680
write!
No extended partition
Was able to mount the remaining single partition in debian.
Plugging the card back to my mobile, it is identified as "mobile storage", the SD-Extension is marked as "missing".
A number of apps are not available any more.
It appears to me like I had removed some kind of advanced Android partition format relating to memory extension and converted the SD to a bare data storage.
Can I revert this? ddrescue?
And how can I fix the damaged [android_meta] and [android_expand], after all?