Close to resolution ? i have repeated experiment again .
the result is ls -l EFI/BOOT -r-xr-xr-x 1 root root 110592 10æ 13 17:57 bootia32.efi <------ -rwxr-xr-x 1 root root 120832 10æ 13 17:57 bootx64.efi namely information from netbsd is needless . so [refind-bin-0.8.3.zip download] is not required . i recall what i have done for USB memory. 1) boot linux (in my cace deviandog : http://blog.livedoor.jp/hatahatajavq-12/archives/1039108656.html ) fdisk /dev/sdb fdisk -l /dev/sdb Device Boot Start End Sectors Size Id Type /dev/sdb1 2048 1050623 1048576 512M b W95 FAT32 <----- /dev/sdb4 1050624 3915775 2865152 1.4G a6 OpenBSD mkfs.vfat /dev/sdb1 <---- 2)boot PC by openbsd CD op install58(amd64 snapshots) install openbsd by ordinal procedure . when [make dev] ends , # appers . then mount /dev/sd1i /mnt2 mkdir -p /mnt2/efi/boot cp /mnt/usr/mdec/BOOT* /mnt2/efi/boo what about this ? there may be some imcopleteness , then help me. --- regards , tuyosi