On Thu, Aug 20, 2009 at 12:56:04PM +0300, Pasi Kärkkäinen wrote: > On Thu, Aug 20, 2009 at 09:54:27AM +0800, Nick Cheng wrote: > > Hi Gentlemen, > > We have worked it out with new firmware and driver. > > You can download the latest F/W from > > ftp://ftp.areca.com.tw/RaidCards/BIOS_Firmware/ARC1680/ and use the attached > > driver. > > Please have a try. > > Any comments are welcome. > > Thanks! I'll give it a try today and report back. > v1.47 firmware seems to fix this problem! The system behaves _much_ better now even when Areca is busy flushing it's cache! I didn't update the driver, only Areca firmware. Is there something imported fixed in the latest driver? I'm using the default driver included in RHEL/CentOS 5.3. # modinfo arcmsr.ko filename: arcmsr.ko version: Driver Version 1.20.00.15.RH1 2008/02/27 -- Pasi > > > Thank you, > > -----Original Message----- > > From: Pasi Kärkkäinen [mailto:pasik@xxxxxx] > > Sent: Wednesday, August 19, 2009 10:09 PM > > To: Nick Cheng > > Cc: 'Andrew Morton'; 'Michael Fuckner'; linux-kernel@xxxxxxxxxxxxxxx; > > linux-scsi@xxxxxxxxxxxxxxx; 'Erich Chen' > > Subject: Re: Performance issues with Areca 1680 SAS Controllers > > > > On Thu, Nov 20, 2008 at 03:39:40PM +0800, Nick Cheng wrote: > > > Hi Michael, > > > I will get around handling your issue. > > > Thanks for your kindly patience, > > > > > > > Hello, > > > > Was this issue resolved? I'm seeing similar behaviour.. I think it's related > > to flushing the controller cache? > > > > Waiting a while (after the disk leds stop blinking) performance is back to > > normal.. > > > > -- Pasi > > > > > -----Original Message----- > > > From: Andrew Morton [mailto:akpm@xxxxxxxxxxxxxxxxxxxx] > > > Sent: Thursday, November 20, 2008 9:18 AM > > > To: Michael Fuckner > > > Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; Nick Cheng; > > > Erich Chen > > > Subject: Re: Performance issues with Areca 1680 SAS Controllers > > > > > > (cc's added) > > > > > > On Wed, 19 Nov 2008 13:16:56 +0100 > > > Michael Fuckner <michael@xxxxxxxxxxx> wrote: > > > > > > > Hi, > > > > > > > > I am using an Areca 1680-SAS-Controller with 16 SAS-HDD (Seagate 1TB > > > > ST31000640SS). I set up a Raid6 with all 16 disks and formatted it with > > > > XFS. The Controller has 512MB RAM and a BBU. The OS is installed to > > > > another disk attached to the onboard AHCI controller. > > > > > > > > After doing some IO, the areca raidset is slower compared to the rate > > > > directly > > > > after boot. > > > > > > > > > > > > [root@storage ~]# dd if=/dev/sdb1 of=/dev/null bs=1M count=50k > > > iflag=direct > > > > 51200+0 records in > > > > 51200+0 records out > > > > 53687091200 bytes (54 GB) copied, 59.6494 seconds, 900 MB/s > > > > [root@storage ~]# mount /dev/sdb1 /data > > > > [root@storage ~]# cd /data/ > > > > [root@storage data]# ./iozone -i 0 -i 1 -s 32g -r 16m -S 6144 -t 8 -+r > > > > -o >raid6_sync_t8.log > > > > [root@storage data]# cd > > > > [root@storage ~]# umount /data/ > > > > [root@storage ~]# dd if=/dev/sdb1 of=/dev/null bs=1M count=50k > > > iflag=direct > > > > 51200+0 records in > > > > 51200+0 records out > > > > 53687091200 bytes (54 GB) copied, 76.4036 seconds, 703 MB/s > > > > > > > > I tested different Versions of Linux (Centos 5.2, OpenSUSE 11, Debian > > > > Lenny) and Vanilla kernels 2.6.22-2.6.27, all show this behaviour. > > > > > > > > Idea why the device slows down after IO- or better: how to keep the high > > > > rate? Is this reproducible foer Areca SATA Controllers (Type 11XX and > > > 12XX) > > > > > > > > Regards, > > > > Michael! > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Please read the FAQ at http://www.tux.org/lkml/ > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
