LSI MegaRAID SAS 9260-4i with ESXi - low disk performace

Hello,

I'm using a free ESXi version and I have problem with a low disk performance. Disk performance varies widely - transfer 10MB - 181MB/s I have a LSI MegaRAID SAS 9260-4i without BBU. In my opinion, the problem is in the configuration of raid. How I resolve my problem?

After logging to vSphere I go to the Configuration tab and click Health Status.

What's mean: "UNOCNOFIGURED GOOD"?

I running vm with ubuntu live, mount esxi partition and do a 'dd' tests:

root@ubuntu:/mnt# 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, 11.4505 s, 93.8 MB/s

root@ubuntu:/mnt# 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, 9.40127 s, 114 MB/s

root@ubuntu:/mnt# 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, 22.8363 s, 47.0 MB/s

root@ubuntu:/mnt# 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, 93.559 s, 11.5 MB/s

root@ubuntu:/mnt# 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, 96.757 s, 11.1 MB/s

Also i did the hdparm test:

root@ubuntu:/mnt# hdparm -Tt /dev/sda

 

/dev/sda:

Timing cached reads:   21080 MB in  2.00 seconds = 10549.20 MB/sec

Timing buffered disk reads: 530 MB in  3.00 seconds = 176.51 MB/sec

root@ubuntu:/mnt# hdparm -Tt /dev/sda

 

/dev/sda:

Timing cached reads:   20586 MB in  2.00 seconds = 10301.77 MB/sec

Timing buffered disk reads: 532 MB in  3.01 seconds = 176.51 MB/sec

Command: MegaCli -AdpAllInfo -aAll

http://pastebin.com/pPXps30P

Command: MegaCli -PDList -aAll

I have a ditional question: How I can get a smart for diferent disk?

Sorry for my english,

Regards,

Łukasz