A quick way to check the type of the drive
Is there a quick way to understand a type of the "storage" on Linux? Is it a HDD or SSD (or NVMe)?
It's already known that the host is a physical machine and not a VM.
The first thing I though about was rotational flag under /sys/block/<device>/queue/ directory. But in my experience even for SSD devices it may contain "1" value.
The second way and more realistic and truthful was a latency. It's a bit harder to measure (some work with /proc/diskstats), but looks more preferable.
Is there any other ways? It's important to mention that I don't need to know exact model of the "storage", just its type.
linux storage proc
asked Jan 21 at 5:16
lesovskylesovsky
585
add a comment |
Is there a quick way to understand a type of the "storage" on Linux? Is it a HDD or SSD (or NVMe)?
It's already known that the host is a physical machine and not a VM.
The first thing I though about was rotational flag under /sys/block/<device>/queue/ directory. But in my experience even for SSD devices it may contain "1" value.
The second way and more realistic and truthful was a latency. It's a bit harder to measure (some work with /proc/diskstats), but looks more preferable.
Is there any other ways? It's important to mention that I don't need to know exact model of the "storage", just its type.
linux storage proc
asked Jan 21 at 5:16
lesovskylesovsky
585
1
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
2
Along withsmartctlmentioned here, other utilities such aslshwandlsblkreport the same information. See also askubuntu.com/q/792814/295286
– Sergiy Kolodyazhnyy
Jan 21 at 15:47
1
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
@Sergiy Kolodyazhnyy, I've not found such info inlshw. Alsolsblkrelies onrotationalflag in sysfs directory hence I can't trust it.smartctluses ioctl call and asks inforamtion directly from device.
– lesovsky
Jan 21 at 19:32
add a comment |
Is there a quick way to understand a type of the "storage" on Linux? Is it a HDD or SSD (or NVMe)?
It's already known that the host is a physical machine and not a VM.
The first thing I though about was rotational flag under /sys/block/<device>/queue/ directory. But in my experience even for SSD devices it may contain "1" value.
The second way and more realistic and truthful was a latency. It's a bit harder to measure (some work with /proc/diskstats), but looks more preferable.
Is there any other ways? It's important to mention that I don't need to know exact model of the "storage", just its type.
linux storage proc
asked Jan 21 at 5:16
lesovskylesovsky
585
Is there a quick way to understand a type of the "storage" on Linux? Is it a HDD or SSD (or NVMe)?
It's already known that the host is a physical machine and not a VM.
The first thing I though about was rotational flag under /sys/block/<device>/queue/ directory. But in my experience even for SSD devices it may contain "1" value.
The second way and more realistic and truthful was a latency. It's a bit harder to measure (some work with /proc/diskstats), but looks more preferable.
Is there any other ways? It's important to mention that I don't need to know exact model of the "storage", just its type.
linux storage proc
linux storage proc
asked Jan 21 at 5:16
lesovskylesovsky
585
asked Jan 21 at 5:16
lesovskylesovsky
585
asked Jan 21 at 5:16
lesovskylesovsky
585
asked Jan 21 at 5:16
lesovskylesovsky
585
asked Jan 21 at 5:16
lesovskylesovsky
585
585
1
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
2
Along withsmartctlmentioned here, other utilities such aslshwandlsblkreport the same information. See also askubuntu.com/q/792814/295286
– Sergiy Kolodyazhnyy
Jan 21 at 15:47
1
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
@Sergiy Kolodyazhnyy, I've not found such info inlshw. Alsolsblkrelies onrotationalflag in sysfs directory hence I can't trust it.smartctluses ioctl call and asks inforamtion directly from device.
– lesovsky
Jan 21 at 19:32
add a comment |
1
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
2
Along withsmartctlmentioned here, other utilities such aslshwandlsblkreport the same information. See also askubuntu.com/q/792814/295286
– Sergiy Kolodyazhnyy
Jan 21 at 15:47
1
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
@Sergiy Kolodyazhnyy, I've not found such info inlshw. Alsolsblkrelies onrotationalflag in sysfs directory hence I can't trust it.smartctluses ioctl call and asks inforamtion directly from device.
– lesovsky
Jan 21 at 19:32
1
1
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
2
2
Along with
smartctl mentioned here, other utilities such as lshw and lsblk report the same information. See also askubuntu.com/q/792814/295286– Sergiy Kolodyazhnyy
Jan 21 at 15:47
Along with
smartctl mentioned here, other utilities such as lshw and lsblk report the same information. See also askubuntu.com/q/792814/295286– Sergiy Kolodyazhnyy
Jan 21 at 15:47
1
1
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
@Sergiy Kolodyazhnyy, I've not found such info in
lshw. Also lsblk relies on rotational flag in sysfs directory hence I can't trust it. smartctl uses ioctl call and asks inforamtion directly from device.– lesovsky
Jan 21 at 19:32
@Sergiy Kolodyazhnyy, I've not found such info in
lshw. Also lsblk relies on rotational flag in sysfs directory hence I can't trust it. smartctl uses ioctl call and asks inforamtion directly from device.– lesovsky
Jan 21 at 19:32
add a comment |
1 Answer
1
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How about something like sudo smartctl -a /dev/<device> | grep Rotation -- if this returns Rotation Rate: Solid State Device, then that's an SSD. Not sure if this bullet-proof method, either.
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
add a comment |
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1 Answer
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How about something like sudo smartctl -a /dev/<device> | grep Rotation -- if this returns Rotation Rate: Solid State Device, then that's an SSD. Not sure if this bullet-proof method, either.
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
add a comment |
How about something like sudo smartctl -a /dev/<device> | grep Rotation -- if this returns Rotation Rate: Solid State Device, then that's an SSD. Not sure if this bullet-proof method, either.
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
add a comment |
How about something like sudo smartctl -a /dev/<device> | grep Rotation -- if this returns Rotation Rate: Solid State Device, then that's an SSD. Not sure if this bullet-proof method, either.
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
How about something like sudo smartctl -a /dev/<device> | grep Rotation -- if this returns Rotation Rate: Solid State Device, then that's an SSD. Not sure if this bullet-proof method, either.
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
answered Jan 21 at 5:31
Janne PikkarainenJanne Pikkarainen
28.2k34067
28.2k34067
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
add a comment |
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
1
1
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
Looks good, it works even with drives attached through RAID cards.
– lesovsky
Jan 21 at 6:56
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
@lesovsky, I wouldn't count on it working through a RAID card. I don't have any SSDs attached to RAID that I can test with, but it shows incorrect rotational rates for the spinning disks (every disk in the array shows up as 10k, when they're all actually 7.2k).
– Mark
Jan 22 at 0:07
add a comment |
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1
Measuring latency is not a good answer as some rotational disks come with huge caches which may or may not be easy to distinguish from full capacity solid state devices.
– anx
Jan 21 at 11:03
2
Along with
smartctlmentioned here, other utilities such aslshwandlsblkreport the same information. See also askubuntu.com/q/792814/295286– Sergiy Kolodyazhnyy
Jan 21 at 15:47
1
what would you use this info for? In other words, if I give you program called isHDDorSSD what will you do with it
– aaaaaa
Jan 21 at 18:18
Bonnie++ can show SSD vs HDD based on IOPS (as can dd)
– warren
Jan 21 at 18:19
@Sergiy Kolodyazhnyy, I've not found such info in
lshw. Alsolsblkrelies onrotationalflag in sysfs directory hence I can't trust it.smartctluses ioctl call and asks inforamtion directly from device.– lesovsky
Jan 21 at 19:32