fat16lib:
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More information would be useful. If SD Formatter fails, download SdFat http://code.google.com/p/sdfatlib/downloads/list and run the SdInfo example and post the results.
I formatted the possibly damaged SD card with SD Formatter and tried again. The Arduino device (Arduino Mega with some shields) still couldn't read it. I followed your instructions to prepare the SD cards info with an Arduino UNO board (for both the working SD card and the not working SD card). Unfortunately, I have no idea how to analysis the info.
Can you help me out?
Here is the info of the possibly damaged SD card,
Card type: SD1
Manufacturer ID: 0X2
OEM ID: TM
Product: SD02G
Version: 2.8
Serial number: 449635488
Manufacturing date: 3/2007
cardSize: 2059.40 MB (MB = 1,000,000 bytes)
flashEraseSize: 128 blocks
eraseSingleBlock: true
SD Partition Table
part,boot,type,start,length
1,0X0,0X6,243,4019175
2,0X0,0X0,0,0
3,0X0,0X0,0,0
4,0X0,0X0,0,0
Volume is FAT16
blocksPerCluster: 64
clusterCount: 62791
freeClusters: 62791
freeSpace: 2057.54 MB (MB = 1,000,000 bytes)
fatStartBlock: 244
fatCount: 2
blocksPerFat: 246
rootDirStart: 736
dataStartBlock: 768
Here is the info of the SD card that can work with the Arduino device,
Card type: SD1
Manufacturer ID: 0X15
OEM ID: MC
Product: SMI
Version: 0.0
Serial number: 3720085777
Manufacturing date: 12/2003
cardSize: 513.28 MB (MB = 1,000,000 bytes)
flashEraseSize: 128 blocks
eraseSingleBlock: false
SD Partition Table
part,boot,type,start,length
1,0X0,0X6,233,1002030
2,0X0,0X0,0,0
3,0X0,0X0,0,0
4,0X0,0X0,0,0
Volume is FAT16
blocksPerCluster: 32
clusterCount: 31304
freeClusters: 31304
freeSpace: 512.88 MB (MB = 1,000,000 bytes)
fatStartBlock: 234
fatCount: 2
blocksPerFat: 123
rootDirStart: 480
dataStartBlock: 512