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Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)

To: Alan Piszcz <ap@xxxxxxxxxxxxx>
Subject: Re: Lots of con-current I/O = resets SATA link? (2.6.25.10)
From: Hannes Dorbath <light@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 06 Jul 2008 12:44:28 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <alpine.DEB.1.10.0807060447180.5005@xxxxxxxxxxxxxxxx>
References: <fa.u8J+BqAcxU1mg8ob9pMBJaAHBPo@xxxxxxxxxx> <486FBFAB.5050303@xxxxxxx> <alpine.DEB.1.10.0807051527210.8002@xxxxxxxxxxxxxxxx> <48700228.7060904@xxxxxxx> <alpine.DEB.1.10.0807051923380.23222@xxxxxxxxxxxxxxxx> <alpine.DEB.1.10.0807060447180.5005@xxxxxxxxxxxxxxxx>
Sender: xfs-bounce@xxxxxxxxxxx
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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


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