Hello! maybe slightly ot I hardly try to get an 3w-9xxx 12 port sata raid on an tyan-2882 (dual opteron 246, 4gb ram) to work well on an SL 4. my problem is that i have a write-rate something about 20mb/s. I already tried it with: blockdev -satra 16384 3ware FW Update on 9.2.1 Kernel Update 2.6.12.2 numa off complety other distribution ubuntu warty (64bit version) I ran tiobench and bonnie++ on ext3 and xfs, but I always get only 20mb/sec. In iostat I can see that I have about 80-90% iowait. I double checked that I switched on the wrtite cache. Maybe somebody has an idea regards! sven