microSDカード読書速度比較

SSD、HDDのベンチマーク的なことをやったら面白かったのでRaspberryPiやら空撮やらでお世話になるmicroSDカードも計測してみました。

書き込みテスト

sync; time dd if=~/test.tmp of=/dev/null bs=500k count=128

読み出しテスト

sync; time dd if=./test.tmp of=/dev/null bs=500k count=128

※読み出しテストはどのカードも5.8GBps程度になってしまった。
測り方が違う気がするので最初のだけ掲載。

1. Lexar High-Performance 633x microSDHC UHS-I(DJI Phantom3のおまけ)
write(平均 14.2MBps)
65536000 bytes transferred in 5.253865 secs (12473865 bytes/sec)
65536000 bytes transferred in 4.822953 secs (13588356 bytes/sec)
65536000 bytes transferred in 3.981091 secs (16461819 bytes/sec)
read(平均 5.8GBps←本当？)
65536000 bytes transferred in 0.010854 secs (6037955122 bytes/sec)
65536000 bytes transferred in 0.010930 secs (5996071526 bytes/sec)
65536000 bytes transferred in 0.012100 secs (5416206714 bytes/sec)

2. TOSHIBA microSDHCカード 32GB Class10 (最大転送速度30MB/s) (海外パッケージ)
write(平均 9.7MBps)
65536000 bytes transferred in 6.624679 secs (9892706 bytes/sec)
65536000 bytes transferred in 6.355218 secs (10312156 bytes/sec)
65536000 bytes transferred in 7.334672 secs (8935096 bytes/sec)

2.東芝 microSDHC 32GB 防水 40MB/s Class10 UHS-I TOSHIBA
write(平均 10MBps)
38756352 bytes transferred in 4.199986 secs (9227734 bytes/sec)
38756352 bytes transferred in 3.739213 secs (10364842 bytes/sec)
38756352 bytes transferred in 3.777271 secs (10260411 bytes/sec)
38756352 bytes transferred in 3.734452 secs (10378056 bytes/sec)

3.キングストン Kingston microSDHC カード 4GB クラス 4 アダプタ付 SDC4/4GB
(多分あきばお～にて購入)
write(平均 6.5MBps)
21052416 bytes transferred in 4.636127 secs (4540949 bytes/sec)
21052416 bytes transferred in 3.039646 secs (6925943 bytes/sec)
21052416 bytes transferred in 2.954018 secs (7126706 bytes/sec)
21052416 bytes transferred in 2.862508 secs (7354535 bytes/sec)

4. SanDisk Ultra microSDHC カード UHS-I Class10
(多分あきばお～にて購入)
write(平均 18.8MBps)
21096960 bytes transferred in 1.395738 secs (15115274 bytes/sec)
21096960 bytes transferred in 1.073142 secs (19659056 bytes/sec)
21096960 bytes transferred in 1.174783 secs (17958173 bytes/sec)
21096960 bytes transferred in 0.930946 secs (22661855 bytes/sec)

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