How to check if a disk is SSD or HDD
Contents
Linux will detects SSD automatically.
Since kernel version 2.6.29, you can check /dev/sda
with following command
1
|
# cat /sys/block/sda/queue/rotational |
The return number 0
shows you /dev/sda
is a SSD, and 1
shows it is a HDD.
Note that this command may not work when your disk is created by hardware RAID.
Another way is to use lsblk
command, a part of the util-linux package.
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# lsblk -d -o name,rota NAME ROTA sda 0 sdb 1 |
ROTA
means rotational device, 1
for true, 0
for false.
This command report the same information as in /sys/block/.../queue/rotational
Author Wenhan Shi
LastMod 2020-03-26 (02c19e3)