[CentOS] Installing on Abit BE7-RAID

Bryan J. Smith b.j.smith at ieee.org
Fri Sep 9 06:01:32 UTC 2005

On Thu, 2005-09-08 at 22:47 -0400, Drew Weaver wrote:
> Good luck getting a hw raid vendor (other than 3ware) to help you :-)

FRAID is _not_ hardware RAID.  There is *0* hardware on-board.  It's a
100% "dumb" ATA controller, with a trick BIOS for 16-bit Int13h disk
services, and then a trick driver for the OS that has 100% of the RAID
logic.  It uses your CPU for 100% of the activity -- even when you are
targeting the volume, the raw drives are still visible by the OS.

3Ware _is_ a true, intelligent hardware RAID -- on-board ASIC + SRAM.
>From the standpoint of your CPU, it's just sending a stream of data to
the ASIC, not the drives.  It can't even see the drive or communicate
with them.  This is a _core_ difference between FRAID and intelligent
hardware RAID.

Bryan J. Smith     b.j.smith at ieee.org     http://thebs413.blogspot.com
The best things in life are NOT free - which is why life is easiest if
you save all the bills until you can share them with the perfect woman

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