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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.Hawaii.Edu!news.uoregon.edu!la-news1.digilink.net!news-out.internetmci.com!peerfeed.internetmci.com!panix!feed1.news.erols.com!howland.erols.net!news.mathworks.com!uunet!in2.uu.net!news.va.pubnix.com!not-for-mail From: lidl@va.pubnix.com (Kurt J. Lidl) Newsgroups: comp.unix.bsd.bsdi.misc,comp.os.linux.misc Subject: Re: BSDi + AHA2944W + Eclipse RAID Date: 15 Nov 1996 18:23:35 -0500 Organization: UUNET Technologies -- Fairfax, Virginia, USA Lines: 61 Message-ID: <56iu1n$3qt@arrow.va.pubnix.com> References: <55j0ci$8l8@gol1.gol.com> <55tuo6$r02@news1.anet-dfw.com> <56e1qh$4t8@oldman.steinkamm.com> <56glrn$c1k@olympus.nwnet.net> NNTP-Posting-Host: arrow.va.pubnix.com Xref: euryale.cc.adfa.oz.au comp.unix.bsd.bsdi.misc:5281 comp.os.linux.misc:141927 In article <56glrn$c1k@olympus.nwnet.net>, Anthony Talltree <aad@nwnet.net> wrote: >> I'm pretty sure, that my systems provided with three SCSI controllers >> will show up a better performance. > >Go ahead -- list an exact configuration where three SCSI controllers actually >work reliably. I've been trying to do it for the better part of a year. Well, our Amanda dump machine has 4 SCSI controllers in it and it works great. We have 7 2GB drives stripped together, spread across 2 controllers. We have a single DLT tape on another controller and the last controller has a 2GB system disk and the DAT tape. Since you wanted specifics: DEC Celebris MTE 4100, 64MB memory 2 x Adaptec 1742 controllers 2 x Adaptec 2742 controllers 1 x DEC DEFEA FDDI card It works reliably. Maybe the problem is your motherboard, because I have an existance proof that BSDi can deal with that many SCSI controller effectively. >> you want to use ? Or do you think about the ccd(4) driver ? > >BSD/OS doesn't include ccd. 2.1 includes the cd driver, which is really >crufty. 2.2 aka 3.0 is claimed to come with a new striping driver if/when >it ships. The (unsupported) cd driver that BSDi ships as part of 2.1 is almost identical to the "cd" driver that 4.4BSD had. The "ccd" driver that NetBSD and later FreeBSD bsd uses is a modified version of the "cd" driver from 4.4BSD. The first release of the "ccd" driver for NetBSD was more or less exactly the same as what BSDi shipped with 2.1. >>-) There are supported RAID systems. > ^ very expensive What is your point? RAID systems are expensive, irregardless of the system you hook them up to. If you can't afford to suffer from disk drive failures, you buy RAID arrays. If you rely on software RAID systems on PC hardware, you can enter a state where you will lose a single disk and then can't get the OS back up to the point where you can rebuild from the RAID'd disks. This is why NT's software RAID solution isn't that interesting - if you lose your C: partition, you can't reboot. >>-) BSD/OS is a real professional and commercial unix system. > >Albeit with some major faults -- eg., no real patch management. I'll take BSDi's system over something like the "system" that SunOS/Solaris has anyday. -Kurt -- /* Kurt J. Lidl (lidl@va.pubnix.com) UUCP: <Earth>!uunet!lidl */ /* Don't confuse my opinions with my employer's opinions! */