> I know it is a lot faster but would that solve the parity problem on > boot completely? 'man bio' doesn't seem to answer that.
For a variety of reasons, hardware raid controllers handle ungraceful shutdown better -- onboard batteries for the HBA's RAM/Cache, etc. Hardware RAID almost never goes into a blocking state recalculating parity before the OS starts -- you can do it manually though The PERC4 and PERC5 cards in PowerEdge servers have the ability to set the "background rebuild rate" anywhere from 10-99% of the controller bus/disk usage. ~BAS > > Matt
