----- Mail original ----- > De: "Linda Walsh" <[email protected]> > À: [email protected] > Envoyé: Samedi 22 Septembre 2012 21:09:55 > Objet: bug#12489: inconsistent output from 'dd' w/rt stats and suppression. > > If I have 'dd' running, and want to see stats, the manpage says I can > send it > a USR1 signal and it will print "I/O statistics to standard error and > then resume copying". I see something like: > 18335302+0 records in 18335302+0 records out 9387674624 > bytes > (9.4 GB) copied, 34.6279 seconds, 271 MB/s > > The same I/O statistics are displayed at the end of a 'dd' session: > > 18335302+0 records in > 18335302+0 records out > 9387674624 bytes (9.4 GB) copied, 34.6279 seconds, 271 MB/s > > The man page says I can use the > "status=noxfer" to suppress transfer statistics". > > But when I use it the number of records transfered into 'dd' > and out of 'dd' are still displayed. Suppressed is the > sum of the bytes transferred in and out, and the time+rate. > > So... it seems status=noxfer isn't fully suppressing the statistics > but more accurately only suppresses the summary, time and rate > stats and not the # records transfered in and out. > > Either way... shouldn't it just suppress the whole message, > or what's the point? What switch would one use to suppress > all I/O statistics? > > Thanks, > Linda > > dd if=/dev/zero of=/tmp/foo count=1024 2>/dev/null || echo "dd fail"
Gilles
