I installed software RAID on a RedHat 5.2 machine last week. I had previously upgraded the kernel to 2.2.3. Everything went well. It is RAID5 on 5 Seagate SCSI drives on a BusLogic board, totalling around 35G of available disk space. Last night we had a power outage. The system restarted without problems except for the RAID. The was successfully recognized by the raidadd command, but it failed to start with the raidrun command. I ran ckraid with a number of different options, all ran successfully, but raidrun still failed. I downloaded, compiled and installed the latest RAID tools from RedHat. Supposedly all I need is raidstart, but this simply fails with an 'invalid argument'. I need to mount this drive. Bummer. This is urgent, so if someone felt so inclined, to call me at (310) 689-3170, call collect, ask for Thornton, and if you can fix the problem over the phone we will pay a fair value for your time. Of course, I gladly invite any suggestions via this list also. thornton