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How to list block devices in Redhat or Centos to identify hard disk devices

# lsblk

NAME        MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda           8:0    0   50G 0 disk
├─sda1        8:1    0    1G 0 part /boot
└─sda2        8:2    0   49G 0 part
├─cl-root 253:0    0   47G 0 lvm /
└─cl-swap 253:1    0    2G 0 lvm [SWAP]
sdb           8:16   0   50G 0 disk
sr0          11:0    1 56.7M 0 rom