Otto's Diary

●ベンチマーク。 http://plaza18.mbn.or.jp/~moriban/linux/HardDiskPerformance.html 参考。

[読み込み速度]

cat << EOF > read.sh
for i in [1] [2] [3] [4] [5] [6] [7] [8] [9] [10];do sleep 10;echo \$'\n\n' \$i;hdparm -t /dev/sda;done
EOF
sh read.sh > read.dat

grep MB read.dat

 Timing buffered disk reads:  216 MB in  3.00 seconds =  71.99 MB/sec
 Timing buffered disk reads:  218 MB in  3.01 seconds =  72.31 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.02 MB/sec
 Timing buffered disk reads:  218 MB in  3.01 seconds =  72.31 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.03 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.03 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.02 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.02 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.03 MB/sec
 Timing buffered disk reads:  218 MB in  3.03 seconds =  72.02 MB/sec

読み込みはTranscendの３倍強！！。

[書き込み速度]
# 512M ファイル書き込み10回 (10秒間隔)

cat << EOF > write.sh
for i in [1] [2] [3] [4] [5] [6] [7] [8] [9] [10];do sleep 10;echo \$'\n\n' \$i;date;time dd if=/dev/zero of=/home/hdparm_write\$i.tmp ibs=1M obs=1M count=512;date;done
EOF
sh write.sh >& write.dat

grep MB write.dat

536870912 bytes (537 MB) copied, 2.49061 seconds, 216 MB/s
536870912 bytes (537 MB) copied, 2.29765 seconds, 234 MB/s
536870912 bytes (537 MB) copied, 2.53568 seconds, 212 MB/s
536870912 bytes (537 MB) copied, 5.47399 seconds, 98.1 MB/s
536870912 bytes (537 MB) copied, 2.25572 seconds, 238 MB/s
536870912 bytes (537 MB) copied, 2.28278 seconds, 235 MB/s
536870912 bytes (537 MB) copied, 2.35199 seconds, 228 MB/s
536870912 bytes (537 MB) copied, 3.81463 seconds, 141 MB/s
536870912 bytes (537 MB) copied, 2.30783 seconds, 233 MB/s
536870912 bytes (537 MB) copied, 2.30698 seconds, 233 MB/s

かなりふらつくけど速い!!というか、読むより速いというのはどういうことか。
バッファがかなり効いているのだろう。

[書き込み速度(2)]
# 512M ファイル書き込み10回 (1秒間隔)

cat << EOF > write.sh
for i in [1] [2] [3] [4] [5] [6] [7] [8] [9] [10];do sleep 1;echo \$'\n\n' \$i;date;time dd if=/dev/zero of=/home/hdparm_write\$i.tmp ibs=1M obs=1M count=512;date;done
EOF
sh write.sh >& write2.dat

grep MB write2.dat

536870912 bytes (537 MB) copied, 2.54268 seconds, 211 MB/s
536870912 bytes (537 MB) copied, 8.63932 seconds, 62.1 MB/s
536870912 bytes (537 MB) copied, 6.65312 seconds, 80.7 MB/s
536870912 bytes (537 MB) copied, 7.75247 seconds, 69.3 MB/s
536870912 bytes (537 MB) copied, 6.14376 seconds, 87.4 MB/s
536870912 bytes (537 MB) copied, 10.1293 seconds, 53.0 MB/s
536870912 bytes (537 MB) copied, 9.07099 seconds, 59.2 MB/s
536870912 bytes (537 MB) copied, 9.90108 seconds, 54.2 MB/s
536870912 bytes (537 MB) copied, 8.62047 seconds, 62.3 MB/s
536870912 bytes (537 MB) copied, 10.8297 seconds, 49.6 MB/s

思ったよりも速度が落ちなかった。これなら十分。というわけで、MTRONのディスクは十分に使えそう。

MTRONは速い！