Because the disks are striped in Promise FastTrak BIOS, thats not possible. You can add a spare disk (hda or hdb) not participating in RAID and play. But no guarantee that your data will be safe. On Fri, 28 Feb 2003, Albert Dengg wrote: > Hi > my Question is: > is it posible to convert from an ataraid (raid 0), connected to and > onboard PDC20265R controller, to linux software raid without loosing the > data? > > mfg Albert Denng > >