Hi! I've upgraded from the RH6.0 provided rpm to raidtools-19990824-0.90.tar.gz. Still the same. Now, I've got the following curious thing: The offending ioctl is in mkraid.c:46 ret = ioctl(file, SET_ARRAY_INFO, (unsigned long)&cfg->array.param); Now, SET_ARRAY_INFO is declared in md-int.h. (Cool thing, who got the idea to distribute it with the tools and not the kernel?) In 2.2.12 (13pre-12 ac), I did not find the implementation of these ioctls: 1.) greps for the symbolic name just yielded one match in the SPARC architecture dependent part. 2.) studying md.c and raid5.c, I've found the ioctl handlers, and discovered, that raid5.c does not provide a private ioctl handler, and md.c does not provide the SET_ARRAY_INFO ioctl. So where can I get a current raidtools collection? Andreas -- Andreas Kostyrka | [EMAIL PROTECTED] phone: +43/1/7070750 | phone: +43/676/4091256 MTG Handelsges.m.b.H. | fax: +43/1/7065299 Raiffeisenstr. 16/9 | 2320 Zwoelfaxing AUSTRIA