amd64 + RAID freezing system

[Georg Auernhammer]

Hello!

i have an amd64 with Sata 80Gig Hardisk and extra RAID:

ad4: 76319MB <Seagate ST380817AS 3.42> at ata2-master SATA150
ad8: 238475MB <Seagate ST3250823AS 3.03> at ata4-master SATA150
ad10: 238475MB <Seagate ST3250823AS 3.03> at ata5-master SATA150
ad12: 238475MB <Seagate ST3250823AS 3.03> at ata6-master SATA150
ad14: 238475MB <Seagate ST3250823AS 3.03> at ata7-master SATA150
ar0: 476837MB <Promise Fasttrak RAID0+1 (stripe 64 KB)> status: READY
ar0: disk0 READY (master) using ad14 at ata7-master
ar0: disk1 READY (master) using ad10 at ata5-master
ar0: disk2 READY (mirror) using ad8 at ata4-master
ar0: disk3 READY (mirror) using ad12 at ata6-master

newfs and mounting ar0 works.
but as sonn as i am trying to write data on the RAID, the system
freezes.
i had some problems writing the label to ar0s1d
but after some reboots he managed to write the label on ar0.
only thing is, i cant write data...

Any suggestions?
-- 
Georg Auernhammer
http://www.isnochys.de