Others have mentioned the SSD and VFS cache, however spinning disks in a RAID co...

BeeOnRope · on March 29, 2019

Not really "easily" - the second test does 1.5 GB in 0.622s for a throughput of 2.41 GB/s.

If we assume something like 100 MB/s sustained for spinning disks, that's a lot of disks to get to 2.41 GB/s even ignoring overheads.

Rapzid · on March 31, 2019

100 MB/s sustained is very slow these days. Even a Barracuda budget 7200 will hit >150 MB/s real world and it goes up from there.

BeeOnRope · on March 31, 2019

Even at 200 MB/s that is at least a dozen disks in zero redundancy RAID to get the needed speed.

This test was hitting the OS disk cache.