bin/161515: systat does not show Disk MB/s for md devices

[Yoshihiro Ota]

>Number:         161515
>Category:       bin
>Synopsis:       systat does not show Disk MB/s for md devices
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Oct 12 10:10:08 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Yoshihiro Ota
>Release:        9.0-BETA3
>Organization:
>Environment:
FreeBSD pavillion-dv6426us.advok.com 9.0-BETA3 FreeBSD 9.0-BETA3 #511: Wed Oct  5 07:00:49 EDT 2011
>Description:
Per subject line, systat does not show MB/s for md devices and always 0.00.  It shows for ada and da devices okay.


>How-To-Repeat:
An example to reproduce.

systat -vm 1

mdconfig -a -t swap -s 100M
newfs -U /dev/md3
mount /dev/md3 /mnt/tmp
cat /dev/zero > /mnt/tmp/zero

>Fix:
Unknown at this moment.

>Release-Note:
>Audit-Trail:
>Unformatted: