Monthly Archives: September 2015

2.5 Inch Drives Are Not Quick

What can you do if you need high performance, only have 2.5 inch drive slots and can’t afford SSD?

Last year I built two servers using WD Red drives running in RAID 10. The performance is not that great and also not very consistent.

This year I built two more of the same servers, but wanted to equip them with Seagate Laptop SSHD disks which are a hybrid spinning disk/SSD with 8gb of SSD type memory. They cost a few dollars more, about $10 more at the time of this posting.

Reading benchmarks online before buying them, they should be faster than the WD RED drives… but the downside is they are not specifically designed for RAID based systems (does that matter?).

First up, WD Red:

Maximum Read: 143MB/sec
Maximum Write: 86MB/sec


Next, Seagate Laptop SSHD:

Maximum Read: 214MB/sec
Maximum Write: 193MB/sec


Overall, quite a big performance boost. I am really hoping that it helps with the write speed since the workload is just about all write.

I found doing file copies from an SSD over to the Seagate Hybrid drive in Windows was reporting write speeds of 400MB/Sec when coping a 90 gig file. That was very impressive.

To add some extra boost to these old servers I also equipped them with Kingston HyperX Predator 240 GB PCIe sold state drives. Using 100 GB of those drives as a boot device and the balance as a read cache for MySQL data which is stored on the Seagate RAID 10 drives.

How does the HyperX Predator perform in a benchmark test? Lets take a look.

Maximum Read: 1,388MB/sec
Maximum Write: 675MB/sec


Those are certainly some big numbers, looking forward to the price coming down so we can get a few TB of speeds like that.

WD Red Drives – Inconsistent Performer

I have two servers, each with WD Red 2.5 1tb hard drives. The servers run 4 drives in RAID 10 configuration.

I had previously benchmarked them with ATTO’s Disk Benchmark software on two different occasions. I thought it was strange to get different results. Today I was doing another benchmark and again got a 3rd set of results.

Here are the dates and different results I have received.

August 29, 2014

Maximum Read: 162MB/Sec
Maximum Write: 135MB/Sec


April 7, 2015

Maximum Read: 174MB/Sec
Maximum Write: 58MB/Sec

RAID 10 - Slow

September 5, 2015

Maximum Read: 143MB/Sec
Maximum Write: 70MB/Sec


Why so much variance in the results? Really strange…

I suspect the results from April 7, 2015 are probably ‘off’ as the write speed sorta flat lining around 55MB/Sec seems too consistent.

If you just go with the average (maximums) from the other two you get:

Maximum Read: 152MB/Sec
Maximum Write: 102MB/Sec