[CentOS] Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2

Wed May 25 19:01:35 UTC 2016
John R Pierce <pierce at hogranch.com>

On 5/25/2016 11:44 AM, Kelly Lesperance wrote:
> The HBA is an HP H220.

OH.    its a very good idea to verify the driver is at the same revision 
level as the firmware.    not 100% sure how you do this under CentOS, my 
H220 system is running FreeBSD, and is at revision P20, both firmware 
and driver.     HP's firmware, at least what I could find, was a fairly 
old P14 or something, so I had to re-flash mine with 'generic' LSI 
firmware, this isn't exactly a recommended thing to do, but its sure 
working fine for me.

john r pierce, recycling bits in santa cruz