I am using the below command/s to write to 3TB hitachi deskstar 7200RPM disks.
dcfldd if=/dev/urandom status=off | PV -s 3000G | dcfldd of=/dev/sda of=/dev/sda of=/dev/sdb status=off bs=4096 on the HP microserver nl40 with SATA 3Gbps connection, the throughput was 3-4MB/s, around 10.5 days. Where as on my desktop with i5 CPU and 6Gbps connection, the throughput is 13-14MB/s, around 61 hours. My question is: where is the bottleneck on the HP for such low throughput? dcfldd uses one core, granted my desktop is around 4Ghz and HP just under 2Ghz. But.... So far I have heard lot of people say the SATA connection should not make any difference to the throughput on a spindle HDD. Anyone know the reason for such low throughput on HP? -- Kind regards, Yudi
