On 26 February 2015 at 04:56, Marcus MERIGHI <[email protected]> wrote: > hello, > > just wanted to let you know that a running iostat automagically adds cd0 > to it's output when such a device is plugged in: > > $ iostat sd0 4 > tty sd0 cpu > tin tout KB/t t/s MB/s us ni sy in id > 2 189 8.90 14 0.12 0 3 3 0 93 > 0 33 7.60 1 0.01 0 0 1 0 99 > umass1 at uhub3 port 1 configuration 1 interface 0 "MediaTek Inc MT1887" > rev 2.00/0.00 addr 3 > umass1: using ATAPI over Bulk-Only > scsibus5 at umass1: 2 targets, initiator 0 > cd0 at scsibus5 targ 1 lun 0: <TSSTcorp, CDDVDW SE-208DB, MF00> ATAPI > 5/cdrom removable serial.0e8d180676YAF400KW4_ > tty sd0 cd0 cpu > tin tout KB/t t/s MB/s KB/t t/s MB/s us ni sy in id > 0 11 15.09 5 0.08 0.00 0 0.00 0 0 2 0 97 > 0 46 16.00 0 0.01 0.00 0 0.00 1 0 6 0 93 > ^C > $ > > This behaviour contradicts iostat(8): "To force iostat to display > specific drives, their names may be supplied on the command line." > > Bye, Marcus >
I read the man page as saying that the drives specified on the command line are always displayed, but if there are other drives they are also displayed. Up to the limit of 4 drives. i.e. the phrase "iostat displays only the first four drives. To force iostat to display specific drives, ..." does not imply that ONLY the drives specified will be displayed. Now, whether that is the intended behaviour or just a quirk of the delightfully flexible english language I can't say. .... Ken
