InfoScale™ 9.0 Dynamic Multi-Pathing Administrator's Guide - Solaris

Displaying statistics for queued or erroneous I/Os

Use the vxdmpadm iostat show command with the -q option to display the I/Os queued in Dynamic Multi-Pathing (DMP) for a specified DMP node, or for a specified path or controller. For a DMP node, the -q option displays the I/Os on the specified DMP node that were sent to underlying layers. If a path or controller is specified, the -q option displays I/Os that were sent to the given path or controller and not yet returned to DMP.

See the vxdmpadm(1m) manual page for more information about the vxdmpadm iostat command.

To display queued I/O counts on a DMP node:

# vxdmpadm -q iostat show [filter] [interval=n [count=m]]

For example:

# vxdmpadm -q iostat show dmpnodename=c5t2d1s2

               QUEUED I/Os		    Pending I/Os
DMPNODENAME		READS		WRITES
c5t2d1s2	   	2		   15	          30

To display the count of I/Os that returned with errors on a DMP node, path, or controller:

# vxdmpadm -e iostat show [filter] [interval=n [count=m]]

For example, to show the I/O counts that returned errors on a path:

# vxdmpadm -e iostat show pathname=c1t5006016041E03B33d6s2 interval=1

cpu usage = 168144us    per cpu memory = 409600b
                              ERROR I/Os
PATHNAME                   READS    WRITES
c1t5006016041E03B33d6s2    0         0
c1t5006016041E03B33d6s2    0         0