Este es el log que obtengo:
-- Wiping data...
Formatting /data...
Creating filesystem with parameters:
Size: 2147483648
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 8192
Label:
Blocks: 524288
Block groups: 16
Reserved block group size: 127
Created filesystem with 11/131072 inodes and 17193/524288 blocks
Formatting /cache...
Creating filesystem with parameters:
Size: 132120576
Block size: 4096
Blocks per group: 32768
Inodes per group: 8064
Inode size: 256
Journal blocks: 1024
Label:
Blocks: 32256
Block groups: 1
Reserved block group size: 7
Created filesystem with 11/8064 inodes and 1542/32256 blocks
Formatting /sd-ext...
I:Formatting unknown device.
No app2sd partition found. Skipping format of /sd-ext.
Formatting /sdcard/.android_secure...
I:Formatting unknown device.
rm: can't remove '.' or '..'
rm: can't remove '.' or '..'