rocketM5# sysctl kern.geom.debugflags=0xffffffff
kern.geom.debugflags: 0 -> 2147483647
rocketM5# dd if=/dev/flash/spi0 of=uboot.bin count=1 bs=64k
g_dev_open(flash/spi0, 1, 8192, 0x8107fc00)
g_access(0x807859c0(flash/spi0), 1, 0, 0)
open delta:[r1w0e0] old:[r0w0e0] provider:[r0w0e0] 0x80764580(flash/spi0)
g_disk_access(flash/spi0, 1, 0, 0)
g_dev_strategy(0x809c8b48/0x809c8ab0) offset 0 length 65536 data 0xc3328000 cmd 1
bio_request(0x809c8ab0) from 0x807859c0(flash/spi0) to 0x80764580(flash/spi0) cmd 1
g_io_deliver(0x809c8ab0) from 0x807859c0(flash/spi0) to 0x80764580(flash/spi0) cmd 1 error 0 off 0 len 65536
g_dev_done(0x809c8ab0/0x809c8b48) resid 0 completed 65536
1+0 records in
g_dev_close(flash/spi0, 1, 8192, 0x8107fc00)
g_access(0x807859c0(flash/spi0), -1, 0, 0)
open delta:[r-1w0e0] old:[r1w0e0] provider:[r1w0e0] 0x80764580(flash/spi0)
g_disk_access(flash/spi0, -1, 0, 0)
1+0 records out
65536 bytes transferred in 0.136258 secs (480969 bytes/sec)
load: 0.31  cmd: dd 939 [bo_wwait] 3.30r 0.00u 0.09s 0% 1004k
load: 0.31  cmd: dd 939 [bo_wwait] 5.46r 0.00u 0.09s 0% 1004k