Hello, yudi v a écrit : > 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?
The bottleneck is /dev/urandom, i.e. the CPU. Any recent SATA disk should sustain at least 50 MB/s throughput. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/518cbfdc.5040...@plouf.fr.eu.org
