SSD or Classic Rotating disk ???

Hello,
"I have same read/write performance on both server and i need to upgrade capacity on server 1. -> In my humble opinion I don't think this makes sense or possible.  SSDs and SAS' are worlds different and they can't be compatible. I don't know what the other community users would think and we can wait around to see.

Hello.

I'm sorry DELL-Young E ,perhaps your are too YOUNG to make a good response, but this is a snapshot of my hard drive. I'm not drunk when i write. My question was What is the advantage of use SSD if i have same perf on both server. Classical HDD are 3 time cheaper than ssd

server 1 diskserver 1 perfserver 2 diskserver 2 perf

Hi @Phoenix40,

YoungAh is right in stating that it's not possible to achieve the same read/write performance on HDD and SSD.

The difference here might be the test done on the number of disks between the SSD and HDD.

While the SSDs are 6 and the HDDs are 9, the controller writes/reads to all the disks simultaneously.

We might see a difference when you measure against an equal number of SSD and HDDs.

If your goal is to have more storage than performance, I would suggest you go with the HDD disks as offer more storage capacity.

Thanks for this technical response. Effectively with 2 more SSD (8) i can achieve more speed, but HDD is 3 or 4 time cheaper, for more space. But i'm surprised that i cant have a significant difference between HDD and SSD.

Thanks for your help

That's the pure truth.

Server 1: 9 disk (600gb/15k/12g sas) 

Server 2 : 4 disk (480g/12g/ssd sas)

Server 2 : 4 disk (900g/6g/sata dell)

All the same perf. I think H730 is in cause. H730 mini on server 2. H730 on server 1.

All cache activated. Horrible perf without.

Hi. After my questions i see that here there is no Server expert, so you can close and delete this post.

CHECK THIS:-

https://www.zacocomputer.com/advantages-of-using-ssd-server-drives-over-sas-drives/

No problem. But just review my photos and just tell DELL to change their markup on disk case. All that was described in this article, i know it from long time. What i dont undestand is why i cant have significant perf on my SSD.

I clear and simple reponse can be "Perc H730 cant make you have more than xxxxMb/sec read or write". That a clear and technical response. Nevermind article that tell me things i know from 10 or 15 years.