Date: Sun, 02 Apr 2006 10:47:57 +0200 From: Matthias Andree <matthias.andree@gmx.de> To: freebsd-stable@freebsd.org Subject: Re: SATA RAID: Adaptec 1420SA, Promise TX4300? Message-ID: <m3wte8wegy.fsf@merlin.emma.line.org> In-Reply-To: <20060401193549.I56214@localhost> (tenebrae_bsd@niceboots.com's message of "Sat, 1 Apr 2006 20:44:35 -0800 (PST)") References: <20060401110818.U54953@localhost> <m3irptx8w0.fsf@merlin.emma.line.org> <20060401193549.I56214@localhost>
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Tenebrae <tenebrae_bsd@niceboots.com> writes: > On Sat, 1 Apr 2006, Matthias Andree wrote: > >> RAID1 is _not_ a backup, but an availability aid. >> If going for RAID1, be sure to add a backup solution. > > More to think about...thank you. > I am trying to get some peace of mind on a budget, though. I suppose I > need to give more consideration to what my priorities are since I don't > think I will be able to do all that "should" be done. Yup. In doubt, prefer backup hardware (and if only two external 300 GB drives with USB 2.0 Hi-Speed or IEEE 1394 connector) over RAID. People will forgive you if the machine is down for a few hours, but they'll jump on you if you lose their data for good. And having backups on disconnected media that don't break if a surge manages to pass through your power supply is essential. >> Be sure to get something that is real hardware RAID. >> >> You don't need to pay for software RAID, you usually get that for free >> with the onboard chipset these days. > > The motherboard in question is a Tyan Thunder HEsl-T (S2688). It's a > hand-me-down, but still beats the pants off of anything else I've got at > the moment. Well, that board has two(!) onboard Ultra160 SCSI channels, good enough for 30 UW/U2W/U160/U320 drives (software RAID), and it has a Zero-Channel-RAID option if you want hardware RAID. SCSI drives are usually longer-lasting than SATA commodities. Speaking from experience with SATA RAID and SCSI RAID, the latter is much better worked-out. >> No way. Real RAID costs more than twice as much for 4 ports. 150 bucks >> suffice only for the 2 port warm-plug (i. e. you need to manually mark >> the drive for removal in the software or BIOS, then exchange it , then >> manually start the rebuild operation in software or BIOS) >> 3Ware (now AMCC) Escalade 8006-2LP. > > Ah, I see. The 8506-4LP seems to be discontinued from my vendor, but they > do carry the 8006-2LP in that price range. If you can do with 2 drives that is, and can do without being able to Alt+3 from your remote management board. If you want remote management, you need to get the 9000 series AFAIR. -- Matthias Andree
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