Date: Tue, 28 Oct 2003 11:42:17 -0500 From: Charles Swiger <cswiger@mac.com> To: Joe Pokupec <joepok@ninestar.com> Cc: Freebsd-Questions <freebsd-questions@freebsd.org> Subject: Re: RAID 0 After the install? Message-ID: <B1153FB1-0965-11D8-8AC4-003065ABFD92@mac.com> In-Reply-To: <005301c39d29$291b70b0$7807a8c0@JOETABLET>
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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
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