How to Display Extended Disk Statistics (iostat -xtc)

1. Run the iostat -xtc command to display extended disk statistics.

   $ iostat -xtc extended device statistics tty cpu device r/s w/s kr/s kw/s wait actv svc_t %w %b tin tout us sy wt id fd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 0 0 0 0 0 100 sd0 0.0 0.0 0.4 0.4 0.0 0.0 49.5 0 0 sd6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 nfs1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 nfs49 0.0 0.0 0.0 0.0 0.0 0.0 15.1 0 0 nfs53 0.0 0.0 0.4 0.0 0.0 0.0 24.5 0 0 nfs54 0.0 0.0 0.0 0.0 0.0 0.0 6.3 0 0 nfs55 0.0 0.0 0.0 0.0 0.0 0.0 4.9 0 0

   The iostat -xtc command displays a line of output for each disk. The output fields are described in the following list.

   r/s

   Reads per second

   w/s

   Writes per second

   kr/s

   Kbytes read per second

   kw/s

   Kbytes written per second

   wait

   Average number of transactions that are waiting for service (queue length)

   actv

   Average number of transactions that are actively being serviced

   svc_t

   Average service time, in milliseconds

   %w

   Percentage of time that the queue is not empty

   %b

   Percentage of time that the disk is busy