Preclear CPU usage?

[Herdo]

I'm doing 3 passes of preclear on my first two disks and it just started the post-read phase on the third pass.  I just noticed on the Dashboard that my CPU usage bounces around between 80% - 100%.  Is this normal?  I have an Intel G4400.

 

Also, is there some kind of report generated when preclear finishes, or am I to assume the disks "passed" if the actual preclear didn't fail at some point?

 

 

 

 

EDIT:  Just SSHed in and ran top.

 

 

User and System usage are both low, but idle is effectively at 0% (usually between 0% - 5%).  I noticed the IO-wait is very high, is that possibly why unRAID thinks my CPU is being utilized so heavily?  It's counting IO-wait as usage?

 

The preclear_disk.sh process itself is showing  0% CPU and 0.1% Memory.

[John_M]

Yes. Reading/writing a whole diskful of data doesn't use much CPU but it spends hours waiting for I/O.

[Herdo]

Ah OK, that makes sense.

 

Thank you John_M.