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SDカード書き込み速度比較

Last updated at Posted at 2016-12-17

/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

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