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

Thu May 26 06:21:58 UTC 2016
John R Pierce <pierce at hogranch.com>

On 5/25/2016 12:20 PM, m.roth at 5-cent.us wrote:
> Also, you could either, on boot, go into the card's firmware interface,
> and that'll tell you, somewhere, what the firmware version is. Not sure if
> MegaRAID will work with this card - if it does, you really want it..even
> though it has an actively user-hostile interface.

in IT mode, the 2308 is a straight SAS host bus adapter, all drives are 
presented directly to the host OS as native SAS devices.

john r pierce, recycling bits in santa cruz