Re: m4 raid 0.... Do I have to break up the raid to update the firmware?
No, if your system is like mine. I've a P5Q Deluxe with two M4s in a Raid 0. I have updated the firmware several times using the bootable-usb method discussed in this forum (somewhere). First I prepare the bootable usb, then I reboot but go into bios setup and change the storage setting from RAID to AHCI, and then I boot the usb. The usb applies the updates. Then I power off (as instructed by the firmware guide I think), reboot into bios, and set the storage back from AHCI to RAID. Also I check the hard-drive ordering in bios (my bios may have changed the ordering in switching between AHCI and RAID) and make sure the correct drive is picked for booting.