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[root@bw ~]# dd if=/dev/zero of=test bs=64k count=16k 
16384+0 records in 
16384+0 records out 
1073741824 bytes (1.1 GB) copied, 10.1958 seconds, 105 MB/s 
[root@bw ~]# dd if=/dev/zero of=test2 bs=64k count=16k conv=fsync 
16384+0 records in 
16384+0 records out 
1073741824 bytes (1.1 GB) copied, 4.73386 seconds, 227 MB/s 
[root@bw ~]# dd if=test2 of=/dev/null bs=64k count=16k 
16384+0 records in 
16384+0 records out 
1073741824 bytes (1.1 GB) copied, 0.323589 seconds, 3.3 GB/s 
 
不知道我测试的命令对不对。。求指点。。 |   
 
 
 
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