ReadyBoost用に8GB SDHCカードを買ってきてみた。
Readだけ速ければいいかと思って買ったものの、意外と512KB でのRandom write 1.75MB/s（最低） 3.0MB/s（推奨）が厳しい。
それと、4KBでのRandom readがどのデバイスでも4MB/s(1000IOPS)になってしまうのはUSBだからだろうか？
Comfix SD 2GB SLC
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 12.411 MB/s
Sequential Write : 11.078 MB/s
Random Read 512KB : 12.354 MB/s
Random Write 512KB : 4.101 MB/s
Random Read 4KB (QD=1) : 3.977 MB/s [ 971.0 IOPS]
Random Write 4KB (QD=1) : 0.052 MB/s [ 12.6 IOPS]
Random Read 4KB (QD=32) : 4.083 MB/s [ 996.9 IOPS]
Random Write 4KB (QD=32) : 0.054 MB/s [ 13.1 IOPS]
Test : 100 MB [D: 0.5% (9.1/1962.1 MB)] (x1)
Date : 2011/08/30 22:14:24
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
Transcend SD 60x 512MB SLC
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 10.648 MB/s
Sequential Write : 9.447 MB/s
Random Read 512KB : 10.633 MB/s
Random Write 512KB : 7.065 MB/s
Random Read 4KB (QD=1) : 3.643 MB/s [ 889.5 IOPS]
Random Write 4KB (QD=1) : 0.210 MB/s [ 51.3 IOPS]
Random Read 4KB (QD=32) : 3.868 MB/s [ 944.4 IOPS]
Random Write 4KB (QD=32) : 0.218 MB/s [ 53.1 IOPS]
Test : 100 MB [D: 1.3% (6.3/489.3 MB)] (x1)
Date : 2011/08/30 23:16:44
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
PQI U339Pro 2GB SLC
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 23.905 MB/s
Sequential Write : 15.801 MB/s
Random Read 512KB : 23.827 MB/s
Random Write 512KB : 8.045 MB/s
Random Read 4KB (QD=1) : 4.253 MB/s [ 1038.3 IOPS]
Random Write 4KB (QD=1) : 0.118 MB/s [ 28.9 IOPS]
Random Read 4KB (QD=32) : 4.904 MB/s [ 1197.2 IOPS]
Random Write 4KB (QD=32) : 0.120 MB/s [ 29.3 IOPS]
Test : 100 MB [D: 0.0% (0.0/1952.3 MB)] (x1)
Date : 2011/08/30 22:53:24
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
Donya ANOYOROSHI SD 8GB
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.277 MB/s
Sequential Write : 14.230 MB/s
Random Read 512KB : 18.150 MB/s
Random Write 512KB : 1.216 MB/s
Random Read 4KB (QD=1) : 3.404 MB/s [ 831.0 IOPS]
Random Write 4KB (QD=1) : 0.012 MB/s [ 2.8 IOPS]
Random Read 4KB (QD=32) : 3.639 MB/s [ 888.5 IOPS]
Random Write 4KB (QD=32) : 0.018 MB/s [ 4.5 IOPS]
Test : 100 MB [D: 0.0% (0.0/7680.0 MB)] (x1)
Date : 2011/08/30 22:20:33
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
Donya orignal microSD 2GB
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 16.167 MB/s
Sequential Write : 6.802 MB/s
Random Read 512KB : 14.956 MB/s
Random Write 512KB : 1.566 MB/s
Random Read 4KB (QD=1) : 1.404 MB/s [ 342.7 IOPS]
Random Write 4KB (QD=1) : 0.069 MB/s [ 16.8 IOPS]
Random Read 4KB (QD=32) : 1.649 MB/s [ 402.5 IOPS]
Random Write 4KB (QD=32) : 0.077 MB/s [ 18.7 IOPS]
Test : 100 MB [D: 0.0% (0.0/1909.7 MB)] (x1)
Date : 2011/08/30 22:25:19
OS : Windows XP Professional SP3 [5.1 Build 2600] (x86)
