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

Wed May 25 19:20:34 UTC 2016
Kelly Lesperance <klesperance at blackberry.com>

I installed the latest firmware and driver (mpt2sas) from HP on one system.  The driver is v20, it appears the firmware may be 15, though:

[   11.128979] mpt2sas version loaded
[   11.513836] mpt2sas0: LSISAS2308: FWVersion(, ChipRevision(0x05), BiosVersion(

On 2016-05-25, 3:01 PM, "centos-bounces at centos.org on behalf of John R Pierce" <centos-bounces at centos.org on behalf of pierce at hogranch.com> wrote:

>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
>CentOS mailing list
>CentOS at centos.org