Question: I am seeing only 50MB/s reads:

```
ensnare@box:~$ sudo hdparm -tT /dev/sda
[sudo] password for ensnare:

/dev/sda:
 Timing cached reads:   4592 MB in  2.00 seconds = 2296.48 MB/sec
 Timing buffered disk reads:  192 MB in  3.90 seconds =  49.24 MB/sec

```

The array is already rebuilt and operational. Is this kind of slow performance normal? Anything I can do to make it faster? There weren't too many options in the controller configuration. Thanks.

Answer: 
The H200 controller disables all disk caching built into the drives by default. 

If the server has battery backup you can enable basic drive caching on the Logical Volumes without risk.

Goto www.LSI.com (The controller is made by LSI) and download and install MegaRAID Storage Manager.

Highlight the Virtual Raid Volume, right click, properties. Enable Cache and save.

You have to do this on every logical raid volume.

Your performance difference is incredible.
Here's THE best solution if going to a H700 isnt possible.
Enable cache directly from the firmware. YOU MUST be running on a battery backup or if power goes out you could be hosed by enabling the cache. Below is a tutorial explaining the full process to do so.

<http://www.1337admin.org/windows-server/windows-server-2012-r2/dell-h200-raid-controller-speed-hack/>