Re: Apparent strange disk behaviour in 6.0

Poul-Henning Kamp wrote:
> In message <42E88135.30603_at_elischer.org>, Julian Elischer writes:
> 
> Please use gstat and look at the service times instead of the 
> busy percentage.
> 
> 

The snapshot below is typical when doing tar from one drive to another..
(tar c -C /disk1 f- .|tar x -C /disk2 -f - )

dT: 1.052  flag_I 1000000us  sizeof 240  i -1
  L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w    d/s   kBps   ms/d 
%busy Name
     0    405    405   1057    0.2      0      0    0.0      0      0    0.0 
9.8| ad0
     0    405    405   1057    0.3      0      0    0.0      0      0    0.0 
11.0| ad0s2
     0    866      3     46    0.4    863   8459    0.7      0      0    0.0 
63.8| da0
    25    866      3     46    0.5    863   8459    0.8      0      0    0.0 
66.1| da0s1
     0    405    405   1057    0.3      0      0    0.0      0      0    0.0 
12.1| ad0s2f
   195    866      3     46    0.5    863   8459    0.8      0      0    0.0 
68.1| da0s1d

even though the process should be disk limitted neither of the disks is anywhere
near 100%.

puting 'team' between the two copies of tar (as a fifo)
doesn't change the numbers.