Test I/O performance by timing the writing of 100Mb to disk

time dd if=/dev/zero of=dummy_file bs=512k count=200
Write 200 blocks of 512k to a dummy file with dd, timing the result. The is useful as a quick test to compare the performance of different file systems.
Sample Output
200+0 records in
200+0 records out
104857600 bytes (105 MB) copied, 19.6325 seconds, 5.3 MB/s

real    0m19.681s
user    0m0.003s
sys     0m1.427s

1
By: rdc
2012-04-20 13:47:27

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