Firmware Wizard or Boot Disc

[zeroibis]

Which is the safer/preferred method for updating firmware.

For example I got a system with 2 crucial M4s, some storage drive and a raid array on its own card.

Would it be safer if I hooked up the SSDs to an old system and used a Boot Disc to update them?

Or are the Wizards safe enough to trust and hope that my boot sectors stay safe?

[Highendtoys]

The Crucial firmware update will allow you to install the firmware and update software on a thumb drive. The system reboots to the flash drive and updates the drive. Use an older system without a UEFI bios. I used a X58 system.