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#! rnews 1960 bsd Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!cpk-news-hub1.bbnplanet.com!su-news-hub1.bbnplanet.com!news.bbnplanet.com!newsout1.alt.net!news1.alt.net!news.aa.net!usenet From: "brian wehrle" <brianw@aa.net> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: FreeBSD and RAID devices Date: 16 Mar 1997 10:17:38 GMT Organization: Alternate Access Incorporated Lines: 34 Message-ID: <01bc318f$dd574660$055a7dce@bw.aa.net> References: <01bc3102$dbcf68f0$214f96cd@reality> NNTP-Posting-Host: cust5.max3.seattle.aa.net X-Newsreader: Microsoft Internet News 4.70.1155 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:37191 Yes, although there are basically two ways to go: 1) raid in the controller ( DPT, AMI and Buslogic all make cards I believe that do this sort of RAID that is all committed to disk) 2) a RAID box, such as made by Symbios, HP or Clariion. The boxes are quite expensive. I would look at buslogic or DPT, as I believe that you will be able to find drivers for them. But yes, to the OS, the drives look dumb, and the cards will use ordinary SCSI drives. RAID in software is generally less expensive because you can use cheaper hardware, but rather less FT that harware raid configurations. And software RAID eats CPU cycles and can slow disk IO (of course, depending on the operation (read,write) and the RAID you are using). Brian Kurt Schafer <kschafer@cyberbeach.net> wrote in article <01bc3102$dbcf68f0$214f96cd@reality>... > I realize FreeBSD doesn't have any built in RAID(1-5) capabilities. (or did > they sneak that in lately and not tell me ?) > > I'd like to add some fault tolerance to our FBSD network. Can anybody > recommend a good external unit ? I've heard you can get RAID units that > essentially make your disk array look like one SCSI device to the > controller. > > Our SCSI controllers are Adaptec 2940-UW's > > -Kurt >