Thanks Janina--and-David. First of all, Janina, in windows its my d drive, but in Linux its hdb and I was getting thousands of io errors from that drive. Now David, while GRC claims many operating systems can use spinrite, they still don't say how to run the program from linux, if we even can. Hart _______________________________________________ Blinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/blinux-list