[Droid RAZR M Q&A, Help & Troubleshooting] boostedcx:
I do not have a problem flashing system.img in RSD lite at the Fastboot screen, but it still will not boot. Here is what I get when I try

fastboot flash system system.img

G:\sdk\adt-bundle-windows-x86-20130729\sdk\platform-tools>fastboot flash system system.img

< waiting for device >

(bootloader) Variable not supported!

target reported max download size of 31457280 bytes

Invalid sparse file format at header magi

error: write_sparse_skip_chunk: don't care size 817976576 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 786523392 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 755049728 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 723596544 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 692131072 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 660677888 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 629220608 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 601281792 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 570733824 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 539280640 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 507823360 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 476456192 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 444822784 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 413349120 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 381891840 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 350414080 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 318936320 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 287483136 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 255898880 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 224445696 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 194192640 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 165188864 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 133698816 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 102245632 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 70792448 is not a multiple of th

e block size 4096

error: write_sparse_skip_chunk: don't care size 39634176 is not a multiple of th

e block size 4096

error: write_sparse_skip_chunk: don't care size 8176896 is not a multiple of the

block size 4096

sending sparse 'system' (30716 KB)...

error: write_sparse_skip_chunk: don't care size 817976576 is not a multiple of t

he block size 4096

error: write_sparse_skip_chunk: don't care size 817976576 is not a multiple of t

he block size 4096

OKAY [ 2.507s]

writing 'system'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 2.710s