It has to do with data access speeds....CDs justs cannot spin fast enough and generally only have the one "head" (the laser that reads).
USB is fast enough that you can boot up a machine and run an OS directly without a HDD.....the new genration of SSDs work essentially like a big USB thumb drive (only better).
I know more than a few Linux hackers who can walk up to any computer and tell it to boot from their USB drive (running Linux) and get anything off any HDD or network drive that computer has access to. They simply bypass the "onboard" OS entirely.
It has to do with data access speeds....CDs justs cannot spin fast enough and generally only have the one "head" (the laser that reads).
USB is fast enough that you can boot up a machine and run an OS directly without a HDD.....the new genration of SSDs work essentially like a big USB thumb drive (only better).
I know more than a few Linux hackers who can walk up to any computer and tell it to boot from their USB drive (running Linux) and get anything off any HDD or network drive that computer has access to. They simply bypass the "onboard" OS entirely.
