[Moto Maxx Q&A, Help & Troubleshooting] krishna13:
This is how i did this time..

C:\Users\SRK\Downloads\Motorola firmware>fastboot oem config fsg-id " "

...

OKAY [ 0.003s]

finished. total time: 0.006s

C:\Users\SRK\Downloads\Motorola firmware>

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash bootloader bootloader.img

target max-sparse-size: 256MB

sending 'bootloader' (2163 KB)...

OKAY [ 0.077s]

writing 'bootloader'...

(bootloader) flashing sbl1 ...

(bootloader) flashing aboot ...

(bootloader) flashing tz ...

(bootloader) flashing sdi ...

(bootloader) flashing rpm ...

OKAY [ 0.204s]

finished. total time: 0.285s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash boot boot.img

target max-sparse-size: 256MB

sending 'boot' (16384 KB)...

OKAY [ 0.590s]

writing 'boot'...

OKAY [ 0.123s]

finished. total time: 0.714s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash recovery recovery.img

target max-sparse-size: 256MB

sending 'recovery' (16400 KB)...

OKAY [ 0.599s]

writing 'recovery'...

OKAY [ 0.110s]

finished. total time: 0.715s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.0

target max-sparse-size: 256MB

sending 'system' (262143 KB)...

OKAY [ 8.335s]

writing 'system'...

OKAY [ 1.698s]

finished. total time: 10.118s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.1

target max-sparse-size: 256MB

sending 'system' (239764 KB)...

OKAY [ 7.597s]

writing 'system'...

OKAY [ 1.551s]

finished. total time: 9.155s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.2

target max-sparse-size: 256MB

sending 'system' (250695 KB)...

OKAY [ 7.947s]

writing 'system'...

OKAY [ 1.617s]

finished. total time: 9.569s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.3

target max-sparse-size: 256MB

sending 'system' (255001 KB)...

OKAY [ 8.070s]

writing 'system'...

OKAY [ 1.592s]

finished. total time: 9.669s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.4

target max-sparse-size: 256MB

sending 'system' (257746 KB)...

OKAY [ 8.156s]

writing 'system'...

OKAY [ 1.622s]

finished. total time: 9.782s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.5

target max-sparse-size: 256MB

sending 'system' (261982 KB)...

OKAY [ 8.291s]

writing 'system'...

OKAY [ 1.695s]

finished. total time: 9.992s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.6

target max-sparse-size: 256MB

sending 'system' (262140 KB)...

OKAY [ 8.296s]

writing 'system'...

OKAY [ 1.608s]

finished. total time: 9.911s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.7

target max-sparse-size: 256MB

sending 'system' (247037 KB)...

OKAY [ 7.819s]

writing 'system'...

OKAY [ 1.568s]

finished. total time: 9.393s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.8

target max-sparse-size: 256MB

sending 'system' (262140 KB)...

OKAY [ 8.307s]

writing 'system'...

OKAY [ 1.613s]

finished. total time: 9.926s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot flash system system.img_sparsechunk.9

target max-sparse-size: 256MB

sending 'system' (219553 KB)...

OKAY [ 6.985s]

writing 'system'...

OKAY [ 1.379s]

finished. total time: 8.371s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot erase cache

erasing 'cache'...

OKAY [ 0.013s]

finished. total time: 0.016s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot erase userdata

erasing 'userdata'...

OKAY [ 0.012s]

finished. total time: 0.015s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot oem fb_mode_clear

...

OKAY [ 0.002s]

finished. total time: 0.005s

C:\Users\SRK\Downloads\Motorola firmware>fastboot oem config fsg-id "end"

...

FAILED (remote failure)

finished. total time: 0.011s

C:\Users\SRK\Downloads\Motorola firmware>fastboot oem config fsg-id "finish"

...

FAILED (remote failure)

finished. total time: 0.007s

C:\Users\SRK\Downloads\Motorola firmware>fastboot oem config fsg-id ""

...

FAILED (remote failure)

finished. total time: 0.006s

C:\Users\SRK\Downloads\Motorola firmware>fastboot oem config fsg-id " "

...

OKAY [ 0.002s]

finished. total time: 0.004s

C:\Users\SRK\Downloads\Motorola firmware>mfastboot reboot

rebooting...

finished. total time: 0.004s

but same problem..no success ..same ret :-1 in bootloader logs. Did i do wrong??