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Lost cd partition, won't come back

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2013-08-29
2013-08-29
  • Sam Liddicott

    Sam Liddicott - 2013-08-29

    I think my Sandisk Cruzer 32G u3 stick died when I plugged it into a medion cassette tape to mp3 ripper (but I can't be sure).

    Now it just presents itself as a dumb old memory stick (with no CD and all my data gone).

    I took a dd backup of the stick and ran various recover tools to find continuous files but nothing is recoverable.

    What is worse is that the CD partition has shrunk to zero and all attempts to put it back run without error but make no difference.

    The CD size always reports as 0. I wonder if the problem is because the partition count is 0x01 but I don't know how to change that.

    $ sudo u3-tool -p 10000000 /dev/sg3

    On insertion, the kernel reports:
    [1143534.946852] usb 1-1: new high-speed USB device number 7 using ehci-pci
    [1143535.090034] usb 1-1: New USB device found, idVendor=0781, idProduct=5406
    [1143535.090042] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    [1143535.090047] usb 1-1: Product: U3 Cruzer Micro
    [1143535.090050] usb 1-1: Manufacturer: SanDisk
    [1143535.090053] usb 1-1: SerialNumber: 43170318A902C8F7
    [1143535.094913] scsi8 : usb-storage 1-1:1.0
    [1143536.115520] scsi 8:0:0:0: Direct-Access SanDisk Cruzer 7.01 PQ: 0 ANSI: 0 CCS
    [1143536.116816] sd 8:0:0:0: Attached scsi generic sg3 type 0
    [1143536.161369] sd 8:0:0:0: [sdc] Attached SCSI removable disk
    [1143536.713455] sd 8:0:0:0: [sdc] 31355391 512-byte logical blocks: (16.0 GB/14.9 GiB)
    [1143536.753380] sd 8:0:0:0: [sdc] No Caching mode page present
    [1143536.753384] sd 8:0:0:0: [sdc] Assuming drive cache: write through
    [1143536.800683] sd 8:0:0:0: [sdc] No Caching mode page present
    [1143536.800688] sd 8:0:0:0: [sdc] Assuming drive cache: write through
    [1143536.827402] sdc: unknown partition table

    sam@sojo:~$ sudo u3-tool -D /dev/sg3
    Partition info:
    - Partition count: 0x01
    - Data partition size: 16053960704 byte(0x01de7200)
    - Unknown1: 0x00000002
    - CD size: 0 byte(0x00000000)
    - Unknown2: 0x00000000

    Data partition info:
    - Data partition size: 16053960704 byte(0x01de7200)
    - Secured zone size: 0 byte(0x00000000)
    - Unlocked: 0x00000000
    - Password try: 0x00000000

    Chip info:
    - Manufacturer: SanDisk
    - Revision: 70140005

    Property page 0x03:
    - Device size: 16053960704 byte(0x01de7200)
    - Device serial: 43170318A902C8F7
    - Full record length: 0x00000077
    - Unknown1: 0x0b
    - Unknown2: 0x54060781
    - Unknown3: 0x54060781

    Property page 0x0C:
    - Max. pass. try: 5

     
    • Sam Liddicott

      Sam Liddicott - 2013-08-29

      lpinstaller would not recognize the drive.

      After formatting it as a single partionless drive, lpinstaller did recognize it.

      However it was not able to install the u3 launchpad or re-create the cdrom device.

       

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