[SAFS]: check #I/O threads against #disks.
[SAFS]: check #I/O threads against #disks.

icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,icoming/FlashX,zheng-da/FlashX,zheng-da/FlashX,icoming/FlashX,icoming/FlashGraph,icoming/FlashGraph,icoming/FlashX,flashxio/FlashX,icoming/FlashX,flashxio/FlashX,icoming/FlashX,zheng-da/FlashX,icoming/FlashGraph,zheng-da/FlashX,zheng-da/FlashX,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX