ESXi 6.5 with HP DL380 G9 and Raid-Controller P440AR, high latency

[n4p]

Hi there,

few days ago i installed my test system with esxi 6.5 on the host above. But since i start there with some vm's the latency from my raid 10 makes very interessting things. It looks like a sinus wave.

I think i didn't have an impact with the performance, but it looks like not normal that the latency is going down and up every second.

I attached a picture that you can see what i mean.

Thanks for your help!

Kind regards

[admin]

Can you confirm server  firmware version ?

[n4p]

I hope you mean the esxi version?

6.5.0 Update 1 (Build 6765664)

Kind regards

[admin]

I am asking for server hardware ( Raid-Controller P440AR) firmware version .

[n4p]

Oh, i'm sorry.

Here From the Raid Controller:

Firmware Version : 4.52

For Information, i use 4 of this SAS:

Seagate, ST1200MM0088

Thanks

[admin]

you can see below KB published by Hp

HPE Support document - HPE Support Center 

Please check with HP vendor for more information ...

[n4p]

Thanks, i already found that.

But with the VMWare 6.5U1 there is already an newer version of this driver installed. So that would help anything.

Especually any other ideas what i can do?

Thanks

[admin]

I have doubt on  raid controller battery. I ham not  expert in HP hardware  but i have seen problem found in raid controller cache .

if you check with Vendor then will have good idea about raid controller cache.

[n4p]

Thanks,

i will take a look at the battery, but i think esxi shows them as ok.

What i can also try is to enable caching if battery is disconnected or not fully loaded. I think so i could find out if the battery is ok.

I haven't enabled smart cache through the licence, but that cant be the problem or? Because i didn't use ssd's.

[admin]

What i can also try is to enable caching if battery is disconnected or not fully loaded.

I think so you could not enable the caching .  need to check if you configure  read and write ratio  on raid controller .

Hp support team help you more about it and let you know any changes required .

[n4p]

Thanks for your help,

i think i found the issue.

It had nothing to do with the P440AR. The latency is shown by the HPE Dual MicroSD where is Esxi running on it.

If i use an stock usb stick and install there esxi everything works perfect. What i can do now? Or is this an issue from the scratch partition?

Thanks!

[kabanossi]

I'm not surprised. These dual-SD modules can be flaky from time to time. I've had a lot of interesting things happening with Dell dual-SD modules.

For the sake of curiosity, you can benchmark your array performance while USB stick is being used, and compare the results to dual-SD configuration. Most probably, there will be no difference.

[n4p]

Thanks for your Feedback,

yes thats what i already have done.

I made a disk Benchmark with dual sds as boot-device and without them. And the result Shows the same, something about 6000MB/s, so where it should be.

The stick just Destroys the Graph what is present in the webinterface.

But what's really importend difference is the performance between esxi 6.5 and esxi 6.5U1.
Can it bee that 6.5U1 is a lot of slower that the version before?

Kind regards

[RAJ_RAJ]

Hi ,

Please check below is the device you are using , and  you are facing slowness you have to reach to vendor .

HPE Dual 8GB microSD Enterprise Midline USB Kit OID6339687 | HPE™ United Kingdom