Re: question about the best suited RAID level/layout
From: David Brown <hidden>
Date: 2013-07-07 14:08:17
On 06/07/13 17:04, Christoph Anton Mitterer wrote:
On Sat, 2013-07-06 at 03:36 -0500, Stan Hoeppner wrote:quoted
quoted
quoted
hot/warm/cold spares in the chassis. This simply degrades performance.Why should it? If the spare is unused?The answer is rather obvious. If spares are in the chassis one has fewer active array spindles.Sorry... still don't get it... When you have another drive in the chassis... which is not actively used by the RAID, but just waiting as a hot spare for a failing device and rebuild becoming necessary... Apart from power consumption and more heat... how should that affect the read/write performance of the RAID?
I think the point is that you have a slot in your chassis that is not being used actively. If you have five disk bays, then you will get better performance with 5 disks in your array and a spare on the shelf beside it than with 4 disks in the array and a spare in the chassis.