How to check if disk attached to Linux OS is SSD or SATA?

peterdin · 07-26-2021, 01:39 AM

Dear All,

Good Day!

OS Version is Red Hat Enterprise Linux Server release 7.1

1.How to check if disk attached to Linux OS is SSD or SATA?

2.How to check , how many Local disks are available excluding LUN mapped from storage end.

Thanks

obobskivich · 07-26-2021, 02:32 AM

1. If you mean 'NVMe' by SSD, they will show up as /dev/nvme as opposed to /dev/sd as block devices, unless they're all hidden behind a RAID controller or somesuch (won't apply to NVMe of course). SSDs can be SATA devices too, however, so there'd be no way (other than to observe its performance or physically check the device or dump its information and then google whatever you get) to verify mechanical drive vs SSD programatically.

2. Does lsblk do what you want?

syg00 · 07-26-2021, 02:49 AM

Quote:

Originally Posted by obobskivich

... so there'd be no way (other than to observe its performance or physically check the device or dump its information and then google whatever you get) to verify mechanical drive vs SSD programatically.

It rarely pays to be so dogmatic with Linux.

Code:

cat /sys/block/sd?/queue/rotational

"1" means yes, "0" no. There are a few edge cases (USB flash e.g.) but there are also other solutions that might need some parsing - SMART e.g.

TB0ne · 07-26-2021, 08:28 AM

Quote:

Originally Posted by peterdin

Dear All, Good Day!
OS Version is Red Hat Enterprise Linux Server release 7.1

1.How to check if disk attached to Linux OS is SSD or SATA?
2.How to check , how many Local disks are available excluding LUN mapped from storage end.

Have you done ANY research at all? Identify HDD vs SSD and get model #

Code:

lsblk -d -e 7 -o NAME,ROTA,DISC-MAX,MODEL

RAID devices will tell you they're LVM's. Using lspci and lshw will let you find more. Feel free to look at the man pages for those commands.

obobskivich · 07-26-2021, 09:48 AM

Quote:

Originally Posted by syg00

It rarely pays to be so dogmatic with Linux.

Code:

cat /sys/block/sd?/queue/rotational

"1" means yes, "0" no. There are a few edge cases (USB flash e.g.) but there are also other solutions that might need some parsing - SMART e.g.

Yeah my reasoning is basically in-line with your answer here - 'other solutions that might need some parsing' - you can get linux (or whatever other OS, or the system BIOS/UEFI) to spit out a full model # on some level and that will be absolutely definitive once resolved back to the manufacturer specs. I wouldn't (personally) trust any system to make a 'guess' as to a drive being 'rotational' or 'not' (to my understanding this is based on a lookup of the device ID, right?) as the absolute final word (even if it works 99% of the time) specifically because of the aforesaid corner cases (including SSHDs and other hybrid solutions, as well as devices being potentially abstracted by controllers (e.g. as here: https://unix.stackexchange.com/quest...ational-should)). I don't see that as 'dogmatic' but whatever blows your hair back I guess...

mrmazda · 07-28-2021, 12:17 AM

Another option:

Code:

# inxi -dayz
Drives:
  Local Storage: total: raw: 1.93 TiB usable: 1.03 TiB
  used: 694.97 GiB (66.0%)
  ID-1: /dev/sda maj-min: 8:0 vendor: PNY model: CS900 120GB SSD
  size: 111.79 GiB block-size: physical: 512 B logical: 512 B sata: 3.2
  speed: 6.0 Gb/s rotation: SSD serial: <filter> rev: 0613 temp: 33 C
  scheme: MBR
  SMART: yes state: enabled health: PASSED on: 370d 5h cycles: 43
  written: 242 KiB
  ID-2: /dev/sdb maj-min: 8:16 vendor: Hitachi model: HUA722010CLA331
  family: Ultrastar A7K2000 size: 931.51 GiB block-size: physical: 512 B
  logical: 512 B sata: 2.6 speed: 3.0 Gb/s rotation: 7200 rpm serial: <filter>
  rev: A3NH temp: 32 C scheme: GPT
  SMART: yes state: enabled health: PASSED on: 2y 324d 23h cycles: 93
  Pre-Fail: reallocated sector: 100 threshold: 5
  ID-3: /dev/sdc maj-min: 8:32 vendor: Seagate model: ST1000DM003-1CH162
  family: Barracuda 7200.14 (AF) size: 931.51 GiB block-size: physical: 4096 B
  logical: 512 B sata: 3.1 speed: 3.0 Gb/s rotation: 7200 rpm serial: <filter>
  rev: CC49 temp: 31 C scheme: GPT
  SMART: yes state: enabled health: PASSED on: 112d 23h cycles: 15
  read: 18.06 TiB written: 1.52 TiB Pre-Fail: attribute: Spin_Retry_Count
  value: 100 worst: 100 threshold: 97
  Optical-1: /dev/sr0 vendor: ASUS model: DRW-24B1ST j rev: 1.11
  dev-links: cdrom,cdrw,dvd,dvdrw
  Features: speed: 48 multisession: yes audio: yes dvd: yes
  rw: cd-r,cd-rw,dvd-r state: running