"Undocumented" defrag switch still works!!

[MilesAhead]

I used this on Vista64 SP1 and I just did it on W7 32 bit 7077. In XP you could open a command prompt and do:

defrag c: -b to defrag your boot files if boot partition was c:
If you have Vista or W7 do Start Menu=>Accessories=>Command Prompt

then do: defrag /?

you'll notice there's no /B switch documented.
Now if you boot from c: do
defrag c: -b

at least on W7 7077 I get words to the effect "performing boot optimization on c:"

It's nice to know this trick because many of the free defraggers don't have boot optimizer options. They want you to get the Pro version for that feature. It's already there. Plus usually a boot defrag is very fast. I think it just tries to pack up the boot files closer to the front of the partition. It does help a bit though.

[MilesAhead]

Just heard from a guy on another forum that he got a message about some Registry boot parameters not being found. Maybe this is code they just left in defrag.exe but never updated to handle the 64 bit registry hacks? Strange! But it works in Vista 64 bit, so go figure!