First thing you need to do is check and see if Dell is supplying a
Vista-compatible raid driver for the system. Without one, anything further
will be an exercise in futility.
If there is one, then boot with the Vista DVD and start setup, you will need
to supply the raid driver in order to install to those disks. Setup will
overwrite the bootloader, which is likely on the drive with XP, with
Vista's. This bootloader will allow you to select either OS at startup, you
need do nothing special. You should not need to change anything in the BIOS.
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help - www.rickrogers.org
"Don Pullem" <dp2NOSPAM@wideopenwest.com> wrote in message
>I want to setup a RAID 1 system on two blank 250GB HDs on my Dell
> Dimension XPSGen5. I want to install Vista on the RAID 1. I have another
> 250GB HD which presently has XP Home on it. I would like to setup a dual
> boot system so that I can still use XP while I build up the Vista RAID 1
> system. It's possible I might decide to keep XP (depends how the Vista
> install goes).
> My Dell manual explains in detail how to setup the RAID 1 using the Intel
> RAID Option ROM. I understand how to make the necessary change in the BIOS
> for RAID. What I'm not clear on is..
> After I install VISTA on the RAID 1 setup and install Vista. Do I have to
> go back into the BIOS and change them again in order to access Windows XP?
> How do the BIOS get changed depending on what OS you want to boot up?
> I need help on how to configure the setup so I can boot to whatever OS I
> want to use. I would also like any suggestions on how to partition this
> setup. Would it be better to partition the RAID setup and put both OS on
> and use the 3rd HD data/image storage?