Description of problem:

lsblk utility is useful for storage performance tunning and block device diagnostics (it is standard part of RHEL6 sosreport now).

For enterprise multipath devices is important not only check io scheduler parameters for mpath device itself but also for the underlying devices. 

There are new lsblk flags in upstream which allows trivial system observation and problem detection - namely reporting of device state (running, offline, suspended etc.), io scheduler and queue size.

e.g.
# ./lsblk -t -o name,state,type,phy-sec,log-sec,sched,rq-size /dev/sd[if]
NAME            STATE   TYPE  PHY-SEC LOG-SEC SCHED RQ-SIZE
sdf             running disk      512     512 cfq       128
└─mpatha (dm-0) running mpath     512     512 cfq       128
sdi             running disk      512     512 cfq       128
└─mpatha (dm-0) running mpath     512     512 cfq       128

# ./lsblk -t /dev/sd[if]
NAME            ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED RQ-SIZE
sdf                     0    512      0     512     512    1 cfq       128
└─mpatha (dm-0)         0    512      0     512     512    1 cfq       128
sdi                     0    512      0     512     512    1 cfq       128
└─mpatha (dm-0)         0    512      0     512     512    1 cfq       128

If possible, please backport these options to RHEL6.2

Version-Release number of selected component (if applicable):
util-linux-ng-2.17.2-12.el6