Ubuntu
linux package

  1. Bug #620074
  2. Comment #279

Comment 279 for bug 620074

Revision history for this message
In , bpenglase (bpenglase-linux-kernel-bugs) wrote :

PC010233L ~ # dd if=/dev/zero of=/home/bigfile bs=1M count=10000 conv=fdatasync &
[1] 22333
PC010233L ~ # sleep 10
PC010233L ~ # time dd if=/dev/zero of=/home/smallfile bs=4k count=1 conv=fdatasync
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 6.27386 s, 0.7 kB/s

real 0m6.275s
user 0m0.000s
sys 0m0.000s
PC010233L ~ # time dd if=/dev/zero of=/home/smallfile bs=4k count=1 conv=fdatasync
1+0 records in
1+0 records out
4096 bytes (4.1 kB) copied, 2.4702 s, 1.7 kB/s

real 0m2.482s
user 0m0.000s
sys 0m0.000s

This was going to /home which is on a 250gig 7200k RPM SATA II drive. Also, even though the second one (ran about a minute or two later) completed quickly.. it was about another 10 secs till I got the prompt back.