Date: Wed, 26 Oct 2005 15:55:27 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: FreeBSD-ISP <freebsd-isp@freebsd.org> Cc: Marcin Jessa <lists@yazzy.org> Subject: Re: SATA software RAID-inkernel vs hardware Message-ID: <435F8ACF.20203@quip.cz> In-Reply-To: <20051026091105.0d5cbafd.lists@yazzy.org> References: <20051026091105.0d5cbafd.lists@yazzy.org>
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Marcin Jessa wrote: > Hi guys. > > I need to set up a server with two RAID1 SATA drives to do mirroring. > I was wondering if there was any point in using software RAID > controllers like FastTrak S150 TX4. > I've found some info avaliable for Linux and people say kernel raid is > as good as any BIOS raid. Would that be true for FreeBSD as well? > Also using a PCI card for the disc drives in place of the built in SATA > interface may degrade performance, since the built in SATA is probably > on a different PCI bus to plug in cards. AFAIK built-in RAIDs on cheap mainboard are on the same bus, as plug in PCI cards sharing same IRQ. Some manufacturers are explaining this in manuals. Few months ago I was testing built-in SATA RAID on older ASUS board (with Silicon Image onboard SATA RAID). BIOS RAID was unstable and I was not able to found why. Then I setup gmirror which was OK. But all was just home testing, never used in production. > So what would you guys suggest? Keep the card or go for inkernel > implementation? > > Marcin. So my suggest is real HW RAID card (if you have money), or gmirror, but not onboard "pseudo raids". Miroslav Lachman
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