Vary_io may be the reason for this. The driver needs to have .vary_io set to 1. There are no kernel clues to its existence (that I know of), but the driver has an SCSI_HAS_VARY_IO to enable. Our build system will produce correct binaries, but the DKMS tool does not differentiate. There is a need to ship a different driver source in the DKMS package for RHEL3 as a result (Add a #define SCSI_HAS_VARY_IO in the aacraid.h file). Sincerely -- Mark Salyzyn -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] On Behalf Of Matt Domsch Sent: Monday, October 25, 2004 8:22 AM To: Zoe May Cc: linux-raid@xxxxxxxxxxxxxxx Subject: Re: Aacraid - terrible performance on RHES3 pedge 2450 On Mon, Oct 25, 2004 at 11:31:07AM +0100, Zoe May wrote: > > I am experiencing disk performance issues (very slow) with hardware and > software combo listed below. > > Poweredge 2450 > Perc 3/si controller. > RH linux ES3 (2.4.21-4.Elsmp) up2date your system to kernel-smp-2.4.21-20.EL and see how much that helps. You're not the only person who has seen slow disk performance with the -4.EL kernel. Thanks, Matt -- Matt Domsch Sr. Software Engineer, Lead Engineer Dell Linux Solutions linux.dell.com & www.dell.com/linux Linux on Dell mailing lists @ http://lists.us.dell.com - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
