Issue - 'SD Card cannot mount' - on Motorola Milestone

Sometimes (I've been encountered this problem twice), the issue of 'SD card is not mounted' occurs even if the SD card is mounted.

The solution is as below:

1. Use a card reader to operate formatting on your computer.
     using FAT32, assigned the cluster as 4096 byte (4 KB)

2. Inactive the SD card under the command environment.
Win->RUN->cmd->diskpart

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          931 GB      0 B
  Disk 1    Online          465 GB  1024 KB
  Disk 2    Online          136 GB  4096 KB
  Disk 3    Online         7604 MB      0 B

DISKPART> select disk 3

Disk 3 is now the selected disk.

DISKPART> list volume

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
  Volume 0     S                       DVD-ROM         0 B  No Media
  Volume 1     D   1TB-SYS      NTFS   Partition     39 GB  Healthy
  .................................................................
  Volume 17    V                FAT32  Removable   7603 MB  Healthy

DISKPART> select volume 17

Volume 17 is the selected volume.

DISKPART> inactive

DiskPart marked the current partition as inactive.

DISKPART> exit

Leaving DiskPart...

3. Insert the card back to the cellphone and make sure whether it can be recognized correctly.

4. Restore the data.