Re: Awful RAID5 random read performance
From: Wil Reichert <hidden>
Date: 2009-06-02 14:57:16
On Mon, Jun 1, 2009 at 5:43 AM, Maurice Hilarius [off-list ref] wrote:
Thomas Fjellstrom wrote:quoted
.. Yet I've heard NCQ makes some things worse. Some raid tweaking pages tell you to try disabling NCQ.Not so relevant here. This recommendation to disable drive NCQ is generally due tot he fact that NCQ implementations by various manufacturers tend to differ in behaviour, and, in some cases , is just plain "broken".
Not trying to start a flamewar on whos hardware is better, but I'd love to get clarification on that last statement. I've always been under the impression Intel gets their NCQ right (works for me). All the reviews I've read on the current set of AMD southbridges indicate they don't but I've no personal experience there. No idea about nvidia or the cheap add-in sata cards like Silicon Image. Wil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html