[Droid RAZR M Q&A, Help & Troubleshooting] knucklesII:
I used rsd lite withe the firmware in the link provided and received the message "flash failed unknown fastboot command". I searched for a solution specific to the razr m to no avail, although I did find similar solutions for other devices all involving editing the .xml file contained within the .zip file of the firmware. some of the fixes were erasing certain lines in the .xml.

Maybe this will help in understanding the reason why I can't properly flash a rom.

This is the message i get using fastboot to flash cyanogenmod:

(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 211054912 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 179601728 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 148148544 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 116695360 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 85242176 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 53788992 is not a multiple of the block size 4096

error: write_sparse_skip_chunk: don't care size 22335808 is not a multiple of the block size 4096

fastboot: ../libsparse/sparse.c:143: write_all_blocks: Assertion `pad >= 0' failed.

Aborted (core dumped)

This Message when I use sbf_flash:

=== cm-11-20140708-SNAPSHOT-M8-moto_msm8960.zip ===

Index[0]: Unexpected chip 59

Index[1]: Unexpected chip b7

Index[2]: Unexpected chip eb

Index[3]: Unexpected chip 50

Index[4]: Unexpected chip b3

Index[5]: Unexpected chip 82

Index[6]: Unexpected chip e8

Index[7]: Unexpected chip a4

Index[8]: Unexpected chip 38

Index[9]: Unexpected chip 34

Index[10]: Unexpected chip c8

Index[11]: Unexpected chip 8c

Index[12]: Unexpected chip 91

Index[13]: Unexpected chip 7d

Index[14]: Unexpected chip 23

Index[15]: Unexpected chip 96

Index[16]: Unexpected chip b7

Index[17]: Unexpected chip 3b

Index[18]: Unexpected chip 93

Index[19]: Unexpected chip a7

Index[20]: Unexpected chip 6c

Index[21]: Unexpected chip 45

Index[22]: Unexpected chip 9c

Index[23]: Unexpected chip b8

Index[24]: Unexpected chip 5b

Index[25]: Unexpected chip 52

Index[26]: Unexpected chip bd

Index[27]: Unexpected chip 45

Index[28]: Unexpected chip 5d

Index[29]: Unexpected chip ab

Index[30]: Unexpected chip fe

Index[31]: Unexpected chip cf

Index[32]: Unexpected chip 37

Index[33]: Unexpected chip 22

Index[34]: Unexpected chip 8e

Index[35]: Unexpected chip fa

Index[36]: Unexpected chip 27

Index[37]: Unexpected chip ff

Index[38]: Unexpected chip c4

Index[39]: Unexpected chip dd

Index[40]: Unexpected chip ad

Index[41]: Unexpected chip e6

Index[42]: Unexpected chip 3a

Index[43]: Unexpected chip d0

Index[44]: Unexpected chip 9f

Index[45]: Unexpected chip bb

Index[46]: Unexpected chip 54

Index[47]: Unexpected chip 97

Index[48]: Unexpected chip 0f

Index[49]: Unexpected chip 84

Index[50]: Unexpected chip 08

Index[51]: Unexpected chip d7

Index[52]: Unexpected chip dc

Index[53]: Unexpected chip b9

Index[54]: Unexpected chip 8e

Index[55]: Unexpected chip 22

Index[56]: Unexpected chip d2

Index[57]: Unexpected chip 15

Index[58]: Unexpected chip f5

Index[59]: Unexpected chip f2

Index[61]: Unexpected chip 3d

Index[62]: Unexpected chip 74

Index[63]: Unexpected chip f3

Index[64]: Unexpected chip 74

Index[65]: Unexpected chip e7

Index[66]: Unexpected chip 1a

Index[67]: Unexpected chip 64

Index[68]: Unexpected chip d6

Index[69]: Unexpected chip 7b

Index[70]: Unexpected chip 7c

Index[71]: Unexpected chip a3

Index[72]: Unexpected chip be

Index[73]: Unexpected chip 53

Index[74]: Unexpected chip 38

Index[75]: Unexpected chip 1d

Index[76]: Unexpected chip dd

Index[77]: Unexpected chip 3b

Index[78]: Unexpected chip b0

Index[79]: Unexpected chip 8c

Index[80]: Unexpected chip 43

Index[81]: Unexpected chip c3

Index[82]: Unexpected chip eb

Index[83]: Unexpected chip e2

Index[84]: Unexpected chip d5

Index[85]: Unexpected chip ff

Index[86]: Unexpected chip 0e

Index[87]: Unexpected chip 73

Index[88]: Unexpected chip c9

Index[89]: Unexpected chip 66

Index[90]: Unexpected chip 36

Index[91]: Unexpected chip 51

Index[92]: Unexpected chip 2f

Index[93]: Unexpected chip 61

Index[94]: Unexpected chip 17

Index[95]: Unexpected chip 76

Index[96]: Unexpected chip e7

Index[97]: Unexpected chip 16

Index[98]: Unexpected chip 0e

Index[99]: Unexpected chip 01

Index[100]: Unexpected chip 98

Index[101]: Unexpected chip a4

Index[102]: Unexpected chip ee

Index[103]: Unexpected chip a5

Index[104]: Unexpected chip 8d

Index[105]: Unexpected chip fb

Index[106]: Unexpected chip 6a

Index[107]: Unexpected chip 40

Index[108]: Unexpected chip ee

Index[109]: Unexpected chip dc

Index[110]: Unexpected chip ec

Index[111]: Unexpected chip 4b

Index[112]: Unexpected chip d8

Index[113]: Unexpected chip 47

Index[114]: Unexpected chip 9c

Index[115]: Unexpected chip 64

Index[116]: Unexpected chip 9f

Index[117]: Unexpected chip 8d

Index[118]: Unexpected chip ed

Index[119]: Unexpected chip 75

Index[120]: Unexpected chip e7

Index[121]: Unexpected chip 75

Index[122]: Unexpected chip 1a

Index[123]: Unexpected chip d6

Index[124]: Unexpected chip 80

Index[125]: Unexpected chip f2

Index[126]: Unexpected chip 37

Index[127]: Unexpected chip 72

Index[128]: Unexpected chip 04

Index[129]: Unexpected chip c8

Index[130]: Unexpected chip 4b

Index[131]: Unexpected chip 42

Index[132]: Unexpected chip 96

Index[133]: Unexpected chip ff

Index[134]: Unexpected chip 90

Index[135]: Unexpected chip 1c

Data[0]: Header corrupt