weird results from sata vs ssd

[sahostking]

Hi

I have a server setup with 6 x SATA 2TB Enterprise disks on HW Raid 10 with BBU writeback which gives following results:

dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 4.01874 s, 267 MB/s

With Consumer Crucial MX200 1GB SSD x 6 also in HW Raid 10 I get the following (Note Server specs the same except disks):

dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 3.75876 s, 286 MB/s


Its like they running at same speed almost. Not sure what the use of SSD is now though if its giving same results basically? Thoughts?

 

[fabian]

please do a real benchmark - dd is not a benchmark tool, especially not when copying 0s

 

[LnxBil]

The information @fabian forgot was what a real benchmark is :-D

Just search the forums for fio