Timeline for How to know if a disk is an SSD or an HDD
Current License: CC BY-SA 4.0
23 events
| when toggle format | what | by | license | comment | |
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| Feb 8 at 19:18 | comment | added | cyford | On all raids it will show as 0 aswell.. i think unknown is 0 | |
| Jul 16, 2022 at 9:18 | comment | added | Gedeon Mutshipayi | This work for me, i got 0, my disk is SSD. | |
| Feb 18, 2021 at 22:39 | history | edited | Totor | CC BY-SA 4.0 |
adding link purpose
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| Jan 20, 2021 at 20:03 | comment | added | spacebiker | This didn't work for me, both the hd and the ssd show 1 | |
| Jan 28, 2020 at 16:10 | comment | added | arielf |
This works if you know which device to show (e.g. sda) a-priori. If you want to discover disks + whether they are rotational, try @don_crissti answer.
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| Dec 3, 2019 at 9:20 | comment | added | Marki555 | @Ferrybig There are only SSDs in NVME format, not HDDs (unless you do have some strange breakout adapter from NVME slot to plain SATA cable). But not sure if even SATA SSD over NVME shows as NVME in linux or as plain sdX. | |
| Dec 24, 2018 at 10:33 | comment | added | Ferrybig |
On certain computers, you need to run cat /sys/block/nvme0n1/queue/rotational instead, sda does not exist on my laptop
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| Jul 4, 2017 at 13:23 | history | edited | Totor | CC BY-SA 3.0 |
+ not working for harware RAID ctlr
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| Mar 20, 2017 at 10:04 | history | edited | CommunityBot |
replaced http://superuser.com/ with https://superuser.com/
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| Nov 8, 2016 at 21:45 | comment | added | MonoThreaded |
On virtual servers, you may need to fetch /sys/block/vda/queue/rotational
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| Jun 30, 2016 at 16:18 | comment | added | Terrance | @Totor You are correct in the "hybrid" drives. However, dual-drive hybrids show up as two individual drives, where SSHD (Solid-State Hybrid Drive) shows up as a single drive. So, the SSHD would show rotational of 1. | |
| Mar 28, 2016 at 20:42 | comment | added | Totor | @CMCDragonkai They propably appear as rotational since the flash memory is mostly an "improved cache". You tell us... | |
| Nov 1, 2015 at 10:35 | comment | added | CMCDragonkai | What about hybrid drives? | |
| Oct 20, 2015 at 10:44 | comment | added | dma_k | The method does not work for USB sticks – they are certainly not rotational drives (see Doesn't detect USB flash drive as SSD). | |
| Sep 2, 2015 at 10:58 | comment | added | haridsv | Nice! Works without having sudo privileges. | |
| Sep 4, 2014 at 13:21 | comment | added | PythoNic | @totor Better add this comment on the other post. I don't know his/her kernel version :) | |
| Sep 4, 2014 at 12:58 | comment | added | Totor | @PythoNic please file a kernel bug report about this. | |
| Jul 23, 2014 at 10:55 | comment | added | PythoNic | On Stackoverflow somebody found this sys-info didn't work. | |
| Mar 18, 2013 at 4:27 | vote | accept | user4951 | ||
| Feb 25, 2013 at 21:43 | history | edited | Totor | CC BY-SA 3.0 |
+link to kernel commit
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| Feb 25, 2013 at 21:13 | history | edited | Totor | CC BY-SA 3.0 |
added 7 characters in body
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| Feb 21, 2013 at 9:53 | history | edited | Totor | CC BY-SA 3.0 |
added 2 characters in body
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| Feb 21, 2013 at 9:48 | history | answered | Totor | CC BY-SA 3.0 |