Good point about maxing out the pci bus... - I already use the nForce for mirrored boot drives, so that's not an option. The IDE controllers are empty at the moment (save for a DVD drive); I will give this a thought. Thanks for the feedback, -P -----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid-owner@xxxxxxxxxxxxxxx]On Behalf Of Nicola Fankhauser Sent: Wednesday, March 09, 2005 10:48 AM To: linux-raid@xxxxxxxxxxxxxxx Subject: Re: now on to tuning.... hi peter peter.greis@xxxxxxx wrote: > I have been lurking for a while.... I recently put together a raid 5 > system (Asus K8NE SIL 3114/2.6.8.1 kernel) with 4 300GB SATA Seagate > drives (a lot smaller than the bulk of what seems to be on this > list!). Currently this is used for video and mp3 storage, being > Reiser on LVM2. beware that LVM2 _can_ affect your performance. I too believed that the concept of dynamic drives is good, but I experienced a performance hit of about 50% (especially in sequential reads). see my blog entry describing how I built my 2TB file-server at http://variant.ch/phpwiki/WikiBlog/2005-02-27 for some numbers and more explanation. the K8NE has the same SiI 3114 controller as the board I used has; it is connected by a 33mhz 32bit PCI bus and maxes out at 133MiB/s, so for maxmimum performance you might want to connect only two drives to this controller, the other two to the nforce3 chipset SATA ports. > Bonnie++ to test, but with which parameters ? normally it's enough to specify a test-file larger (e.g. twice) the memory capacity of the machine you are testing. for a machine with 1GiB RAM: # bonnie++ -s 2gb {other options} you might as well want to specify the "fast" option which skips per-char operations (which are quite useless to test IMHO): # bonnie++ -f {other options} HTH nicola - 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
