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VPS SSD or Not
| Posted by Seb12, 01-30-2016, 08:42 AM |
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Hello guys, I am wondering how to check on SSH if my server HDD is really SSD as claims by my host.
Sorry for the silly question.
regards,
Sebastien
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| Posted by Andei, 01-30-2016, 09:06 AM |
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Run the IO benchmark:
https://freevps.us/downloads/bench.sh
Should give you a pretty good idea whether or not you're on SSD.
Of course it's not 100% accurate since you could be on a capped SSD or an oversold SSD so the results would be as poor (if not worse) as being on a HDD.
I've ran some tests so you have something to base your results on:
Idle dedicated server with HDD:
Average I/O : 89.2667 MB/s
Non idle VPS with HDD:
Average I/O : 29.8667 MB/s
Non idle VPS with SSD:
Average I/O : 487.333 MB/s
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| Posted by Seb12, 01-30-2016, 09:29 AM |
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Thanks for your reply. Nice script
Below regarding hard disk results. Doesnt help much
Disk Speed
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I/O (1st run) : 1.0 GB/s
I/O (2nd run) : 369 MB/s
I/O (3rd run) : 997 MB/s
Average I/O : 455.667 MB/s
System Info
-----------
Processor : Intel(R) Xeon(R) CPU X5570 @ 2.93GHz
CPU Cores : 4
Frequency : 2926.046 MHz
Memory : 2048 MB
Swap : 0 MB
Uptime : 5:26,
OS : This computer system is for authorized users only. Individuals using this
Arch : x86_64 (64 Bit)
Kernel : 2.6.32-042stab088.4
Hostname : xxxx
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| Posted by JoseDieguez, 01-30-2016, 09:46 AM |
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Doesn't help much?
Average I/O almost 500 MB/s, i would bet $5 that's SSD
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| Posted by Seb12, 01-30-2016, 09:50 AM |
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Yes was my mistake. Indeed it is SSD
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| Posted by Giovanni M, 01-30-2016, 04:30 PM |
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Running dd benchmarks is a good way to measure your IO speed, but as @Andei mentioned, it's not an accurate metric to determine whether you are on a magnetic disk or SSD. I would personally recommend checking your IOPS through a utility known as 'ioping' if you are on Linux; below are example results from both SATA and SSD disks:
SATA:
SSD:
Magnetic disks are usually lower than 210 IOPS, while SSDs usually have more than 3,000 IOPS. You can refer to this table on Wikipedia for measurements.
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| Posted by Seb12, 01-31-2016, 02:13 AM |
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thanks for your suggestion. This command doesnt work on my vps.
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| Posted by net, 01-31-2016, 02:41 AM |
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You need to install ioping to use that.
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| Posted by Giovanni M, 01-31-2016, 03:31 AM |
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You need to install the utility's package first as @net pointed out; the package can be found inside the "epel" repository. Here are the commands in case you are running CentOS:
I hope everything goes well =)
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| Posted by WPCYCLE, 01-31-2016, 11:29 AM |
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I remember seeing such results too when I first switched over to SSD. From that point on, HDD or SSD was no longer a question.
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