Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
>I suggest you ># wget http://svn.drbd.org/drbd/trunk/benchmark/dm.c ># gcc -O -o dm dm.c > >and then to benchmark: > ./dm -x -a 0 -s 4g -b 20m -m -y -p -o /maurice/bonnie/hello Here are the results for the two computers primary (faster one) 29.34 MB/sec (4294967296 B / 02:19.620474) secondary (slower one) 34.57 MB/sec (4294967296 B / 01:58.497313) How can such a fast I/O subsystem as a RAID 6 set of Seagate 750 GB SATAII (3Gbs) drives off an Areca PCIe controller get such dismal results? And why do they contradict the much faster results from dd? For another point of contraction, though less so because it tests just reads, here are hdparm -t test results primary (faster one) Timing buffered disk reads: 426 MB in 3.01 seconds = 141.44 MB/sec secondary (slower one) Timing buffered disk reads: 362 MB in 3.01 seconds = 120.45 MB/sec -- Maurice Volaski, mvolaski at aecom.yu.edu Computing Support, Rose F. Kennedy Center Albert Einstein College of Medicine of Yeshiva University