Subject: Re: Adding disks to a system
To: Brandon D. Valentine <>
From: David Brownlee <>
List: port-sparc
Date: 09/25/2000 00:04:39
On Sun, 24 Sep 2000, Brandon D. Valentine wrote:

> On Sun, 24 Sep 2000, David Brownlee wrote:
> >	Should be no problem, using ccd(4) to stripe the two disks.
> >	You could use raid(4), but that is probably overkill.
> For a newsfeed spool it's not overkill at all.  Those things eat I/O.
> He would definitely benefit from raid0 striping.  There is however
> little point in adding in other raid levels since newsfeed data is
> considered expendable.  The only issue might be the amount of CPU cycles
> he might lose, raid0 doesn't eat that many, but we are talking about an
> IPC here with 25Mhz sun4c.

	Which is why I suggested using ccd(4) to stripe the two disks -
	that should outperform the higher overhead of the equivalent raid

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