Thx. So it looks like mkraid might do this. With this hint, I googled the --danferous-no-resync and try to do this # mdadm --create /dev/md1 --level=5 --assume-clean --raid- devices=4 /dev/sdf /dev/sdg /dev/sdh /dev/sdi But then i ran some io and use iostat to find that only 3 devices has io request and the parity disk has no disk activity at all. so this will be a skewed data for me. Ming On Tue, 2005-07-05 at 19:26 +0200, Lord Hess wrote: > kkraid -R --dangerous-no-resync /dev/md.. > > Regards, > > Lord > > Certon systems GmbH > Hans-Bunte-Str. 8 - 10 > 69123 Heidelberg > Tel: +49 6221 549810 > Fax: +49 6221 549809 > http://www.certon.de > mail to: hess@xxxxxxxxx > -----Ursprüngliche Nachricht----- > Von: linux-raid-owner@xxxxxxxxxxxxxxx > [mailto:linux-raid-owner@xxxxxxxxxxxxxxx] Im Auftrag von Ming Zhang > Gesendet: Dienstag, 5. Juli 2005 19:23 > An: Linux RAID > Betreff: skip raid5 reconstruction > > Hi folks > > I am testing some HW performance with raid5 with 2.4.x kenrel. > > It is really troublesome every time I create a raid5, wait 4 hours for > reconstruction, and then test some data and then recreate another one > and wait again. I wonder if there is any hack or option available to > create a raid5 without reconstruct the parity disk. I just have interest > to test the performance so do not care about data correctness at this > stage. > > Thanks! > > > Ming > > > > > - > 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
