Date: Fri, 06 Mar 1998 22:30:01 -0800 (PST) From: Simon Shapiro <shimon@simon-shapiro.org> To: Greg Lehey <grog@lemis.com> Cc: freebsd-hardware@FreeBSD.ORG, Omar Thameen <omar@clifford.inch.com>, Tom <tom@sdf.com> Subject: Re: getting oriented with RAID Message-ID: <XFMail.980306223001.shimon@simon-shapiro.org> In-Reply-To: <19980307163951.57653@freebie.lemis.com>
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On 07-Mar-98 Greg Lehey wrote:
> On Tue, 3 March 1998 at 17:28:48 -0800, Tom wrote:
>>
>> On Tue, 3 Mar 1998, Omar Thameen wrote:
>>
>>> I really want to make sure I understand the implementation of RAID
>>> on freebsd, because it looks like a great thing to have on production
>>> servers. Sorry if this continues to be very basic.
>>
>> Sorry, there is no "implementation of RAID on freebsd". RAID is
>> handled
>> by the controller. FreeBSD just sees a big disk.
>
> You're just barely correct. I'm writing a software RAID 5
> implementation. ccd is a RAID 0/1 implementation.
Ccd knows how to do ``write-only'' RAID-{0,1}. To recover from a failure,
under CCD is less than automatic. Also, to put your boot device on ccd
RAID is less than trivial.
Recovery and management tools are essential for most people.
----------
Sincerely Yours,
Simon Shapiro
Shimon@Simon-Shapiro.ORG Voice: 503.799.2313
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