Linux Administration Cookbook

Listing disks with lsblk

As part of your base system, a program called lsblk should be installed.

Running this program gives you a human-readable tree view of our system's block devices, their logical separations, and their mount points:

$ lsblkNAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTsda                 8:0    0   40G  0 disk ├─sda1              8:1    0    1M  0 part ├─sda2              8:2    0    1G  0 part /boot└─sda3              8:3    0   39G  0 part   ├─VolGroup00-LogVol00                  253:0    0 37.5G  0 lvm  /  └─VolGroup00-LogVol01                  253:1    0  1.5G  0 lvm  [SWAP]sdb                 8:16   0    2G  0 disk sdc                 8:32   0    2G  0 disk 

A block device is basically a layer of abstraction atop a storage medium; character (raw) devices allow direct access to the storage medium, but may have restrictions applied that are abstracted away by using a block device instead. ...