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Message-ID: <19980214174949.03637@freebie.lemis.com>
Date: Sat, 14 Feb 1998 17:49:49 +1030
From: Greg Lehey <grog@lemis.com>
To: Michael Hancock <michaelh@cet.co.jp>
Cc: freebsd-fs@FreeBSD.ORG
Subject: Re: ccd and ftd
References: <19980214152751.60811@freebie.lemis.com> <Pine.SV4.3.95.980214150616.12825A-100000@parkplace.cet.co.jp>
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In-Reply-To: <Pine.SV4.3.95.980214150616.12825A-100000@parkplace.cet.co.jp>; from Michael Hancock on Sat, Feb 14, 1998 at 03:17:27PM +0900
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On Sat, 14 February 1998 at 15:17:27 +0900, Michael Hancock wrote:
> On Sat, 14 Feb 1998, Greg Lehey wrote:
>
>>> 2940 - disk1 - disk2 - disk3 - disk4
>>>
>>> 	and mirror/duplex the whole array with another identical array.
>>>
>>> 2940 - disk5 - disk6 - disk7 - disk8
>>>
>> Maybe we're talking at cross purposes here.  The current version of
>
> Yes, I'd like to mirror 2 arrays and stripe them.  Presumably, your driver
> would allow you to do the following:
>
> 1) Mirroring
>
> 2) Concatenating and mirroring
>
> 3) Striping and mirroring (expensive, fast, and safe)
>
> 4) Striping with parity (RAID5) (cheaper, pretty fast, and safe)

Yes.  See my last message.

> I don't think anything else is required.  

Neither do I, otherwise I would have done it :-)

> For anything less than fault-tolerant you'd just use ccd.

Why?

Greg

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