topic Netapp sysstat disk util exceed 100% in Active IQ Unified Manager Discussions

Netapp sysstat disk util exceed 100%

FENDERAIYOH — Thu, 05 Jun 2025 06:35:16 GMT

Hi all,

I would like to know why disk util will exceed 100%? Below is the partial sysstat data that i have

CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk FCP iSCSI FCP kB/s iSCSI kB/s

in out read write read write age hit time ty util in out in out

5% 0 0 0 651 9792 4706 4148 0 0 0 8s 35% 0% - 100% 0 651 0 0 9191 4252

5% 0 0 0 682 9557 4883 4280 0 0 0 8s 30% 0% - 100% 0 682 0 0 8962 4424

5% 0 0 0 677 9836 4696 4148 0 0 0 8s 31% 0% - 100% 0 677 0 0 9232 4239

12% 0 0 0 659 8654 4487 4164 3080 0 0 8s 27% 14% Tn 1008% 0 659 0 0 8110 4067

8% 0 0 0 475 6398 3313 4168 26248 0 0 8 45% 100% :f 100% 0 475 0 0 5997 3002

7% 0 0 0 513 7189 3835 3544 31656 0 0 8 30% 100% :f 100% 0 513 0 0 6738 3482

Regards,

fender

Re: Netapp sysstat disk util exceed 100%

Darkstar — Mon, 13 Feb 2012 10:47:48 GMT

This is normal and has to do with the way the filer calculates the util% metric (it's not the average over all disks but only the disk with the highest utilization, for example). This is only a display problem and it is even documented (either in the man-page for the sysstat command, or in the admin guides, don't remember where)

You can ignore these bogus lines. However, having a disk utilization of 100% for longer periods is in itself a problem that you should look into. You might have a hotspot disk or some other problem

-Michael

Re: Netapp sysstat disk util exceed 100%

WICKEDSHARK — Fri, 08 Feb 2013 21:09:34 GMT

Michael is correct sysstat only measures the highest number achieved on a single disk in the controller. This is not the average of all disks. Again as MIchael stated having 100% for long period of times is not a good thing. There is a better way to do disk monitoring for utilization of disks using advanced privilege sessions.