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 short answer is yes, that's the level of performance you should expect to see from the H200.

The long answer: The H200 is the old SAS 6iR with SATA 6Gb/s support. It doesn't have the usual features you'd see on a RAID card (battery backup unit, onboard caching, RAID5/6 support). The cache determines how fast your RAID array is (along w/ the # of spindles and type of drive), so no cache = slow performance. Add the 7200RPM SATA drives (which are slow compared to a 10-15k RPM SAS drive) and that's the level of performance you can expect.
It seems there may be a potential "fix" here but I have not tried it myself:

<http://blog.slucas.fr/en/tips/esxi-perc-h200-slow>