Hi, Quick machine spec : Athlon 1.2, KTA-7 RAID, Diamond Fireport 40, 2 x IBM 60GB drives in a BIOS created RAID array, partitions arranged so:- p1 : 7.5GB NTFS C:\ p2 : 80MB EXT2 /boot p3 : 100MB swap p4 : extended containing :- p5 : 10GB EXT2 / p6 : 30GB EXT2 /home p7 : 30GB NTFS D:\ Got kernel 2.4.9, patched with ACs latest patch, compiled, installed, rebooted. Now it recognises the RAID array fine, it boots fine, but I have created a 340GB test file of random bytes, copying this file from anywhere to anywhere I can do it ONCE. Then any further 'cp', 'rm', 'cat', result in a seg fault. I tried using the ataraid.c/h and hptraid.c/h files from http://people.redhat.com/arjanv/pdcraid, incorporating them into the kernel myself, they recognised the array but wouldn't boot. Anyone had any luck with these drivers or ACs patch? Richard