Date: Tue, 13 Dec 2005 21:37:04 +0100 From: Torfinn Ingolfsen <torfinn.ingolfsen@broadpark.no> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD 6.0 as storage server with raid5? Message-ID: <20051213213704.7b4fb83a.torfinn.ingolfsen@broadpark.no> In-Reply-To: <200512131651.jBDGp2Lx029496@lurza.secnetix.de> References: <20051208001857.68ac4fef.torfinn.ingolfsen@broadpark.no> <200512131651.jBDGp2Lx029496@lurza.secnetix.de>
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On Tue, 13 Dec 2005 17:51:02 +0100 (CET) Oliver Fromme <olli@lurza.secnetix.de> wrote: > There's no reason why you shouldn't be able to do that. Noted. Good to know. :-) > Note that the HPT 18x0A have an onboard processor which > does the XOR (parity) calculations for RAID-5. For the > non-A versions, the host CPU has to do those calculations > (in the driver), which can be quite a noticable burden. Noted, this is valuable information, thanks! I found a test: http://www6.tomshardware.com/storage/20040625/sata-raid-04.html and this test confirms that the RocketRAID 1640 is software raid only. > Some controllers have a setting to enable staged starting > of the drives, i.e. one after the other. This can reduce > the maximum PSU requirement considerably if you have a > lot of disks. Noted, I'll look out for this. > PS: I assume you already know this, but I'd like to note > this for all readers: RAID (of any kind) does not replace > reliable backups. Always make proper backups, independent > of your RAID (if any). I agree 100%, and this cannot be told to often. In my case, the backup server will probably be another FreeBSD box with external firewire drives, to keep costs down. -- Regards, Torfinn Ingolfsen, Norway
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