I downloaded the images from following location: ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-7.0_RC1/evbarm-earmv6hf/binary/gzimg
gunzipped and dd'ed to a Toshiba class 10 microsd 8gb device. Also tried bs=4k argument (and without it as well) that NetBSD documentation suggests. Was unable to boot pi. Tried mounting to check the contents. mount command shows incorrect super block error. Attaching relevant commands. # dd if=rpi_inst.img of=/dev/rld0 bs=4k # mount /dev/ld0a /mnt/usb/ mount_ffs: /dev/ld0a on /mnt/usb: incorrect super block # disklabel /dev/ld0 # /dev/ld0d: type: ld disk: unknown label: fictitious flags: bytes/sector: 512 sectors/track: 63 tracks/cylinder: 64 sectors/cylinder: 4032 cylinders: 3860 total sectors: 15564800 rpm: 7200 interleave: 1 trackskew: 0 cylinderskew: 0 headswitch: 0 # microseconds track-to-track seek: 0 # microseconds drivedata: 0 4 partitions: # size offset fstype [fsize bsize cpg/sgs] a: 15564800 0 4.2BSD 0 0 0 # (Cyl. 0 - 3860*) d: 15564800 0 unused 0 0 # (Cyl. 0 - 3860*) disklabel: boot block size 0 disklabel: super block size 0 #dmesg | grep ld0 ld0 at sdmmc0: <SA08G> ld0: 7600 MB, 3860 cyl, 64 head, 63 sec, 512 bytes/sect x 15564800 sectors ld0: 4-bit width, bus clock 50.000 MHz