transcend : 150X Secure Digital Card | TS2GSD150 | 2GB
mmc0: new SD card at address b368 mmcblk0: mmc0:b368 SMI-S 2031104KiB mmcblk0: unknown partition table
sudo time dd if=/dev/zero of=/dev/mmcblk1
dd: writing to `/dev/mmcblk0': Input/output error 1245961+0 records in 1245960+0 records out 637931520 bytes (638 MB) copied, 305.017 s, 2.1 MB/s
lost page write due to I/O error on mmcblk0 __ratelimit: 4130 callbacks suppressed
fdisk /dev/mmcblk0p1 mkfs.vfat -F 16 -n mmc2gb /dev/mmcblk0p1
[ 3753.793901] mmc0: card lacks mandatory switch function, performance might suffer. [ 3753.795294] mmc0: new SD card at address b368 [ 3753.797821] mmcblk1: mmc0:b368 SMI-S 2031104KiB [ 3753.798758] mmcblk1: unknown partition table
Logical sector size (3582 bytes) is not a multiple of the physical sector size.
lsusb # Bus 005 Device 002: ID 0781:a7a8 SanDisk Corp.
sudo apt-get install sg3-utils sg_scan -i
dmesg
usb 5-8: new high speed USB device using ehci_hcd and address 2 usb 5-8: configuration #1 chosen from 1 choice scsi4 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 2 usb-storage: waiting for device to settle before scanning Vendor: SanDisk Model: SDDR-113 Rev: 1.00 Type: Direct-Access ANSI SCSI revision: 00 SCSI device sdb: 4019200 512-byte hdwr sectors (2058 MB) sdb: Write Protect is on sdb: Mode Sense: 03 00 80 00 sdb: assuming drive cache: write through SCSI device sdb: 4019200 512-byte hdwr sectors (2058 MB) sdb: Write Protect is on sdb: Mode Sense: 03 00 80 00 sdb: assuming drive cache: write through sdb: sdb1 sd 4:0:0:0: Attached scsi removable disk sdb usb-storage: device scan complete
DEST=${TMPDIR}/tmp/dump.img
ddrescue -r1 /dev/sdb1 $DEST $DEST.txt
mount -o loop $DEST /mnt/loop mount: you must specify the filesystem type
mount -o loop $DEST /mnt/loop -t vfat mount: wrong fs type, bad option, bad superblock on /dev/loop0,
dmesg FAT: bogus number of reserved sectors VFS: Can't find a valid FAT filesystem on dev loop0.
How to guess a FAT partition ?
testdisk $DEST
Did not find anything
Anway recovering files is possible :
photorec $DEST
Disk /dev/sdb1 - 2055 MB / 1960 MiB (RO) Partition Start End Size in sectors D empty 0 0 1 1011 63 62 4015616 [Whole disk]