Using /dev/hda (parted) p Disk geometry for /dev/hda: 0.000-28629.562 megabytes Disk label type: msdos Minor Start End Type Filesystem Flags 1 0.031 101.975 primary ext3 boot 2 101.975 20104.782 primary ext3 3 20104.783 28623.625 primary ext3 Using /dev/hdc (parted) p Disk geometry for /dev/hdc: 0.000-28629.562 megabytes Disk label type: msdos Minor Start End Type Filesystem Flags 1 0.031 101.975 primary ext2 raid 2 101.975 20104.782 primary ext2 raid 3 20104.783 28623.625 primary ext2 raid Disk geometry for /dev/hde: 0.000-95396.273 megabytes Disk label type: msdos Minor Start End Type Filesystem Flags 1 0.031 60000.578 primary ext3 raid 2 60000.579 61004.641 primary linux-swap raid 3 61004.641 95393.781 primary ext3 raid Disk geometry for /dev/hdg: 0.000-95396.273 megabytes Disk label type: msdos Minor Start End Type Filesystem Flags 1 0.031 60000.578 primary ext2 raid 2 60000.579 61004.641 primary ext2 3 61004.641 95393.781 primary ext3 raid # mdadm --create --verbose /dev/md4 --level=1 --raid-devices=2 /dev/hde3 /dev/hdg3 mdadm: /dev/hde3 appears to contain an ext2fs file system size=35214480K mtime=Thu Jan 26 13:38:20 2006 mdadm: /dev/hdg3 appears to contain an ext2fs file system size=35214480K mtime=Thu Jan 26 13:38:20 2006 mdadm: size set to 35214400K Continue creating array? y mdadm: SET_ARRAY_INFO failed for /dev/md4: Device or resource busy As you can see I have 4 drive. I am trying to crate raid1 arrays using these drives. obviously its not working. the suggestions I've found to correct the mdadm error have said to build the array in init 1. this has not worked for me either. all 5 md devices give this error. I have tried to force the array as well as building it with missing devices. none of witch have worked. can anyone help with getting these arrays working? thank for any assistance -- Ipsa scienta protesta est - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html