[Droid RAZR M Q&A, Help & Troubleshooting] TheSpecificOcean:
I thought i might post the log from the fastboot attempts when im using the fastboot that comes with the retail stock firmware. I noticed some that looked out of place and have searched them but found nothing that helped main culprits being

(bootloader) Variable not supported!

(bootloader) Preflash validation failed

Invalid sparse file format at header magi

Flashing bootloader images ...
So as to use latest flash capabilities

< waiting for device >
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'partition' (32 KB)...
OKAY [ 0.012s]
writing 'partition'...
FAILED (remote failure)
finished. total time: 0.284s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'sbl1' (101 KB)...
OKAY [ 0.018s]
writing 'sbl1'...
OKAY [ 0.559s]
finished. total time: 0.578s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'sbl2' (126 KB)...
OKAY [ 0.019s]
writing 'sbl2'...
OKAY [ 0.929s]
finished. total time: 0.948s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'sbl3' (512 KB)...
OKAY [ 0.049s]
writing 'sbl3'...
OKAY [ 1.111s]
finished. total time: 1.160s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'rpm' (140 KB)...
OKAY [ 0.017s]
writing 'rpm'...
OKAY [ 0.552s]
finished. total time: 0.570s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'tz' (192 KB)...
OKAY [ 0.023s]
writing 'tz'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.319s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'aboot' (256 KB)...
OKAY [ 0.025s]
writing 'aboot'...
OKAY [ 0.827s]
finished. total time: 0.853s
rebooting into bootloader...
OKAY [ 0.008s]
finished. total time: 0.008s

Flashing modem SW...

error: < waiting for device >
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'fsg' (2825 KB)...
OKAY [ 0.221s]
writing 'fsg'...
OKAY [ 1.169s]
finished. total time: 1.391s
(bootloader) Variable not supported!
erasing 'modemst1'...
OKAY [ 0.617s]
finished. total time: 0.618s
(bootloader) Variable not supported!
erasing 'modemst2'...
OKAY [ 0.613s]
finished. total time: 0.613s

Flashing AP Images...

(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'logo' (854 KB)...
OKAY [ 0.071s]
writing 'logo'...
OKAY [ 1.120s]
finished. total time: 1.190s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'devtree' (512 KB)...
OKAY [ 0.047s]
writing 'devtree'...
OKAY [ 0.348s]
finished. total time: 0.395s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'boot' (10240 KB)...
OKAY [ 0.789s]
writing 'boot'...
OKAY [ 2.806s]
finished. total time: 3.595s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
sending 'recovery' (10240 KB)...
OKAY [ 0.790s]
writing 'recovery'...
OKAY [ 2.002s]
finished. total time: 2.794s
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
Invalid sparse file format at header magi
(bootloader) Variable not supported!
target reported max download size of 31457280 bytes
Invalid sparse file format at header magi
(bootloader) Variable not supported!
erasing 'tombstones'...
OKAY [ 0.801s]
finished. total time: 0.801s
(bootloader) Variable not supported!
erasing 'cache'...
OKAY [ 1.045s]
finished. total time: 1.045s

Erasing userdata...

(bootloader) Variable not supported!
erasing 'userdata'...
OKAY [ 4.423s]
finished. total time: 4.423s

All images flashed. Check logs for errors!

Press any key to continue . . .