--- On Mon, 4/25/11, miljerizem <[email protected]> wrote:
> I am a little confused with the Raid 0 setup.
> It would fit in my budget.
> RAID 5 would be nice but would break the budget.
RAID 0 stripes data across two or more drives. If any one drive quits you lose
everything. The main advantage to RAID 0 was it improved read/write speed due
to the transfer rate capability of the interface being so much faster than any
single drive.
With SATA and 500+ gig drives there's not much point to RAID 0.
RAID 5 stripes the data across 3 or more drives with about one drive's worth of
space being used for parity data. This can survive the loss of any ONE drive
then can rebuild the data once the bad drive is replaced.
Do some web searching and you can find a hardware RAID 5 PCI Express controller
at a good price, though ones with all *internal* connectors seem hard to find.
Most of the 4-port ones have two internal and two external connectors. Dunno
why.
SATA drives have dropped drastically in price, especially if you get
refurbished ones.
You do NOT want to use software RAID. I'd stay away from RAID controllers built
into motherboards. A big advantage of a hardware RAID plug-in card is you can
move the controller and drives to another computer if the motherboard fails. If
you can't get the exact same model and revision of motherboard, your chances of
data recovery get really small and/or very expensive.
I've never tried moving a software RAID (on a plug-in controller or built in)
to another PC, so I dunno if that has any pitfalls looming. Software RAID puts
more load on your CPU because it uses a driver instead of being transparently
handled by the controller.
Hardware RAID appears to the operating system as a single large drive. The OS
knows nothing, sees nothing but a single drive. Most hardware RAID controllers
do have drivers to allow their configuration software to see the individual
drives for setup and management. Most of them have built in firmware which can
be accessed during bootup so the array can be built without having an OS
installed.
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