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Date: Sun, 06 Jul 2008 12:44:28 +0200
From: Hannes Dorbath <light@theendofthetunnel.de>
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Subject: Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)
References: <fa.u8J+BqAcxU1mg8ob9pMBJaAHBPo@ifi.uio.no> <486FBFAB.5050303@shaw.ca> <alpine.DEB.1.10.0807051527210.8002@p34.internal.lan> <48700228.7060904@shaw.ca> <alpine.DEB.1.10.0807051923380.23222@p34.internal.lan> <alpine.DEB.1.10.0807060447180.5005@p34.internal.lan>
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To: Alan Piszcz <ap@solarrain.com>
Cc: xfs@oss.sgi.com

Justin Piszcz wrote:
> In short, utilizing Raptors (especially veliciraptors)+NCQ on the ICH8 
> w/AHCI & other cards in a RAID 5 configuration is a death trap (a good 
> way to lose your data), it appears unsafe to use NCQ w/raptors in a RAID 5
> configuration.  I've defaulted back to disabling it like I always do
> and my RAID5 is rebuilding now.

To my knowledge NCQ and Raptors is completely broken. Besides that, I 
have really bad experiences with the reliability of those drives.


-- 
Best regards,
Hannes Dorbath