The most simple method to test HDD R/W speed in linux system
OS: Centos
> dd if=/dev/zero of=swapfile bs=1024 count=20480000
20480000+0 records in
20480000+0 records out
20971520000 bytes (21 GB) copied, 106.886 s, 196 MB/s
This hard disk should be with the spec of SATA II (3Gbps).
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