DSS 6.0up98.8101.7337 64bit with ESXi 5.0.0 degraded performance

[Al-S]

What is your RAID controller mode/type ? and are you enabling the Write Cache or not? ( try the opposite, if you are turning it on then try to turn it off or turn it on if it's already off).

[AdStar]

My RAID cards are

LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 04)
They are Supermicro AOC-USAS2LP-H8iR (which are an LSI 2108-8port PCI-e SAS-2 controller).

I have just replaced the BBU units and they are charging as we speak (these went bad about a week after I noticed I/O issues).
I'm running RAID10. Write policy is Write-Back (but it's in Write-through mode due to BBU charging) could this have the big an impact on I/O?

Read Policy: Read Ahead
Access Policy: Read-Write
Cache Policy: Direct
Disk cache Policy: Disabled

Do I change any of these settings?

Cheers
Ad

[Al-S]

Try to enable the Disk Cache, and if you have a CacheCade option in the card, try to disable it's options and see.
Also is your LSI running with the latest Firmware? if yes try to downgrade it to the previous Firmware for LSI.

[AdStar]

I had just upgraded to the latest version of DSS today.

I can't seem to connect to the LSI controller via the MegaRAID Storage manager, is there a setting I need to enable in DSS to allow the manager to connect?

Cheers
Adam

[AdStar]

Try to enable the Disk Cache, and if you have a CacheCade option in the card, try to disable it's options and see.
Also is your LSI running with the latest Firmware? if yes try to downgrade it to the previous Firmware for LSI.

Hi,

No CacheCade,

The firmware is 2.120.53-1235

Do I have to be concerned with possible data loss enabling the Disk Cache? or is that negligible in my setup? BBU + Duel power supplies + A+B Power feed, also including the secondary SAN?

[To-M]

If the BBU is charging it will be in a Write Through state thus being slower, wait till the BBU is fully charged then test again.