RAID 0 After the install?

[Charles Swiger]

On Tuesday, October 28, 2003, at 02:57 AM, Joe Pokupec wrote:
> - If I use a hardware ATA RAID card, are there certain system settings
> required for FreeBSD to recognize this, or is the RAID format done at a
> platform-independent level (BIOS or other boot utilities)?

It depends.  Some have a OS-level driver or utility (perhaps one that 
runs under Linux emulation), others work via the BIOS.

> - If one of the 2 hard drives fail, the data will still be visible and
> accessible on the remaining drive correct?

No.  RAID-0 provides no redundancy; use RAID-1 mirroring instead.

> How easy is it to replace the
> failed drive? Will the data from the good drive automatically copy 
> over to
> the newly replaced drive or are there a lot of shenanigans involved?

This also depends.  Generally, you have to kick of a mirror rebuild via 
the BIOS, but some hardware is smarter about this than other hardware.

> - Is it possible to stripe only 1 drive as RAID 0 with the intention of
> dropping in another drive later?

Yes, but doing so isn't useful: the end result is a concatenation 
rather than a true RAID-0 stripe, and you don't gain any performance 
advantages.

-- 
-Chuck