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Date:      Wed, 4 Apr 2001 09:47:31 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Vallo Kallaste <vallo@matti.ee>
Cc:        "Orville R. Weyrich, JR." <orville@weyrich.com>, questions@FreeBSD.ORG
Subject:   Re: RAID
Message-ID:  <20010404094731.A67096@wantadilla.lemis.com>
In-Reply-To: <20010403142812.A80970@myhakas.matti.ee>; from vallo@matti.ee on Tue, Apr 03, 2001 at 02:28:12PM %2B0200
References:  <3AC986CA.22038A9A@weyrich.com> <20010403142812.A80970@myhakas.matti.ee>

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On Tuesday,  3 April 2001 at 14:28:12 +0200, Vallo Kallaste wrote:
> On Tue, Apr 03, 2001 at 01:16:10AM -0700, "Orville R. Weyrich, JR." <orville@weyrich.com> wrote:
>
>> I happen to have come by six identical 4.3 GB SCSI hard drives, and was
>> wondering about an inexpensive way to make a FreeBSD server that uses
>> them.  My manual on FreeBSD covers version 3.2 -- I realize there are
>> newer versions, but my search of the FreeBSD web site doesn't turn up my
>> answer.
>>
>> Is there a way to implement RAID-5 with a couple standard SCSI
>> controllers (the kind at eBay for under $100) or do I need to buy a
>> specialized RAID-5 controller card?
>>
>> Am I asking for too much?  :-)  If it isn't too much, where do I go from
>> here?
>
> You can use vinum volume manager, look at
> http://www.vinumvm.org/
>
> Use recent -stable for implementing vinum and beware that RAID-5 is
> considered somewhat buggy, at least that's what I gather from
> postings in the lists.

A couple of bugs have surfaced in the RAID-5 code recently.  I have
committed fixes for one, and the other is fixed but not committed.

> Use two controllers, three disks each.

That depends on the controllers.  You could get away with one.

Greg
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