On Sun, 12 May 2002, Artur Jasowicz wrote: > As long as DMA was on, I couldn't complete syncing array after configuring > it. Contstant lockups. After I did hdparm -d 0 /dev/hd[e,g,i,k] the arrays > synced and seem to be working correctly now. I need to develop a way of > checking for data corruption. Of course the price is the speed. With DMA on > I was getting 2000K/s syncing speed. without DMA - 800K. I am running plain I'm used to sync speeds above 20000K/s these days. With DMA, of course. > Is your CPU usage also close to 100% when using RAID? Nope, not even close. But having the DMA turned off is certanly a way to put a lot of load on your CPU(s). It seems that either the HPTs have a design flaw or the driver is not fully supporting them. D. - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
