[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw10 bs=50k count=1024
1024+0 records in
1024+0 records out
52428800 bytes (52 MB) copied, 0.106824 seconds, 491 MB/s
0.00user 0.10system 0:00.10elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+215minor)pagefaults 0swaps
[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw100 bs=100k count=1024
1024+0 records in
1024+0 records out
104857600 bytes (105 MB) copied, 0.213256 seconds, 492 MB/s
0.00user 0.19system 0:00.21elapsed 88%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+214minor)pagefaults 0swaps
[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw100 bs=200k count=1000
1000+0 records in
1000+0 records out
204800000 bytes (205 MB) copied, 0.401305 seconds, 510 MB/s
0.00user 0.37system 0:00.42elapsed 88%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+216minor)pagefaults 0swaps
[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw100 bs=100k count=1000
1000+0 records in
1000+0 records out
102400000 bytes (102 MB) copied, 0.195215 seconds, 525 MB/s
0.00user 0.23system 0:00.24elapsed 98%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+216minor)pagefaults 0swaps
[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw200 bs=200k count=1000
1000+0 records in
1000+0 records out
204800000 bytes (205 MB) copied, 0.37515 seconds, 546 MB/s
0.00user 0.37system 0:00.37elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+214minor)pagefaults 0swaps
[root@localhost htdocs]# /usr/bin/time dd if=/dev/zero of=/opt/apache2/htdocs/xcw400 bs=400k count=1000
1000+0 records in
1000+0 records out
409600000 bytes (410 MB) copied, 0.864336 seconds, 474 MB/s
0.00user 0.74system 0:00.86elapsed 85%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+214minor)pagefaults 0swaps