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Description of problem:
The upstream util-linux-ng has simple "lsblk" utility which is used to list block device attributes and display pseudo-tree dependence between devices.
Lsblk can be very useful when investigating more complex configurations
(like lvm over LUKS over partitions) or multipath.
It also allows to display simple attributes of block devices like topology info or selected io scheduler.
There is no similar tool which parses /sys/block info in user friendly way in distro yet.
An example output:
$ lsblk -t
NAME ALIGNMENT MIN-IO OPT-IO PHY-SEC LOG-SEC ROTA SCHED
sda 0 512 0 512 512 1 cfq
├─sda1 0 512 0 512 512 1 cfq
├─sda2 0 512 0 512 512 1 cfq
│ └─sda2_luks (dm-0) 0 512 0 512 512 1
│ ├─vg-data (dm-1) 0 512 0 512 512 1
│ ├─vg-swap (dm-2) 0 512 0 512 512 1
│ └─vg-root (dm-3) 0 512 0 512 512 1
└─sda3 0 512 0 512 512 1 cfq
sdb 0 512 0 512 512 1 deadline
└─sdb1 0 512 0 512 512 1 deadline
This tool contributes to user experience value with RHEL and simplifies administration of storage on RHEL6 and can also help with various storage system diagnostics by providing visual representation of device dependences.
Please backport this utility into RHEL6. It requires only libblkid library (already there) so backporting is straightforward and almost risk free here.
Version-Release number of selected component (if applicable):
util-linux-ng-2.17.2-6.el6.x86_64
Upstream commit
http://git.kernel.org/?p=utils/util-linux-ng/util-linux-ng.git;a=commit;h=2a4c734bee6d52c26b7bfa5312c02f4b22b22645
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
http://rhn.redhat.com/errata/RHBA-2011-0699.html