We are running some benchmarks with raw disk connected to a DAC960
controller. We are having issues with getting proper stats from iostat.
We've tried the latest version we could find ( sysstat version 4.0.6 )
In normal use, we get bizzare numbers, like this:
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s
avgrq-sz avgqu-sz await svctm %util
/dev/rd/c0d0
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 42933903.02 0.00 0.00 100.00
Looking at /proc/partitions, we are also confused, since we see 0 for wio and
rio (and we just did a big dd ) :
[root@dev8-004 root]# cat /proc/partitions | grep c0d0
major minor #blocks name rio rmerge rsect ruse wio wmerge wsect
wuse running use aveq
48 0 107504640 rd/c0d0 0 11734288 105255266 0 0 12286553
104803536 0 2232980 36066697 37688171
Any suggestions?
cliffw