/dev/diskX
のかわりに/dev/rdiskX
に書き込みを行った結果。
BSCR04U2 + SanDisk 16GB 48MB/s
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=1m
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 96.932175 secs (14344172 bytes/sec)
96.95 real 0.00 user 0.82 sys
sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=2m
663+0 records in
663+0 records out
1390411776 bytes transferred in 97.694322 secs (14232268 bytes/sec)
97.81 real 0.00 user 0.59 sys
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=4m
331+1 records in
331+1 records out
1390411776 bytes transferred in 97.797548 secs (14217246 bytes/sec)
97.81 real 0.00 user 0.58 sys
BSCR04U2 + SanDisk 16GB 80MB/s
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=1m
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 96.677065 secs (14382023 bytes/sec)
96.79 real 0.00 user 0.66 sys
sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=2m
Password:
663+0 records in
663+0 records out
1390411776 bytes transferred in 97.791985 secs (14218055 bytes/sec)
97.93 real 0.00 user 0.61 sys
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=4m
331+1 records in
331+1 records out
1390411776 bytes transferred in 97.870929 secs (14206586 bytes/sec)
97.99 real 0.00 user 0.59 sys
MacBook Pro 内蔵SDカードリーダ + SanDisk 16GB 80MB/s
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=1m
Password:
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 96.422072 secs (14420057 bytes/sec)
96.54 real 0.00 user 0.67 sys
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk2 bs=2m
Password:
663+0 records in
663+0 records out
1390411776 bytes transferred in 96.097746 secs (14468724 bytes/sec)
96.22 real 0.00 user 0.62 sys
MR3-C008BK + SanDisk 16GB 80MB/s
1回目
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk3 bs=1m
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 132.090613 secs (10526197 bytes/sec)
132.11 real 0.00 user 1.02 sys
2回目
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk3 bs=1m
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 130.144783 secs (10683577 bytes/sec)
130.27 real 0.00 user 0.67 sys
U3 2 in 1 Ultra SD 4.0 Mobile Phone / PC Card Reader for TF SD Card + SanDisk 16GB 80MB/s
$ sudo time dd if=2016-11-25-raspbian-jessie-lite.img of=/dev/rdisk3 bs=1m
Password:
1326+0 records in
1326+0 records out
1390411776 bytes transferred in 129.601942 secs (10728325 bytes/sec)
129.72 real 0.00 user 0.73 sys