Re: RAID 0 After the install?
On Mon, 27 Oct 2003 22:57:35 -0900, Joe Pokupec [EMAIL PROTECTED] wrote: Hey All, I'd like to use RAID 0 one ATA in my FreeBSD box (it's 4.7 right now, but I plan to upgrade to 5.1 this week). I have some basic questions, if they've been answered already, maybe someone could point me to a link: - 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)? FreeBSD has always automagically recognized my RAID0 array (Promise onboard 20265 and 20276). If you set up the RAID array before installing 5.1 you should be fine. There are also FreeBSD HD management utilities that can be used to create and manage RAID arrays (e.g., atacontrol), but I haven't used them. - If one of the 2 hard drives fail, the data will still be visible and accessible on the remaining drive correct? 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? You are describing RAID1, not RAID0. Some reading about RAID before you do this is recommended, I think. :) Jud ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: RAID 0 After the install?
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 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
