What is the highest speed I can get out of a raid array?

rkd29980

Limp Gawd
Joined
Oct 19, 2015
Messages
181
I am looking at 10Gbe switches and I am wondering if I can get 40Gbe speeds from an array of mechanical disks. All my servers hold 36 drives or more and if I can get a sustained speed of 200MB/s out of one drive than I should be able to get 7.2GB/s or 57.6Gb/s out of 36 drives.

Is my understanding here correct?
 
40Gb/s = 5120MB/s

If a single disk can do 200MB/s sustained, then you need a 26-drive RAID-0 to saturate a 40Gb pipe assuming 100% efficiency. RAID 10/50/60 would change increase that number significantly.

Or you can just do NVMe SSDs if you need speed but not capacity. It's far cheaper.
 
Out of curiosity what OS are your servers on and what is the purpose for filling out a 40gb pipe?
 
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