FAS2552 Fibre Channel Slowly Speed to Dell Vmware

[grax]

Hello! I have a problem with disk read/write via FC (NetAPP Fas 2552 and Vmware Dell R640).

I have 2 channels FC online 8gbps - connections are ok. If i Power on some Virtual Machine (Windows 2019 Server) it`s start very slowly and on working Console (start Internet Explorer etc) a long time...

What is the reason?

To storage are connected 2 other servers via FC too.

Here my Test Speed on Windows Server 2019 Virtual Machine:

Help me pls :/ It`s correct speed?

[cedric_renauld]

Hi Grax, 

I've some questions for you

- Wath's your vSphere version ? 

- How many disk have you in your NetApp ?

- This disk are shared betwen the 2 controlers ?

- Your VMDK arent in Thin provisioning ?

Thanks 

[grax]

- vSphere 6.7U1

- 12disks SAS and 12disks NLSAS

- Yes, i have 2 controllers

- Yes Thin provisioning

[grax]

I have 2x 16Gb Fibre Channel GBIC

Look read speed is ok but write no.

I don`t know why :/ Who help me?

[cedric_renauld]

Hummmm

I know the versions are not the same, but could you check tjis Vmware post :

https://communities.vmware.com/thread/564087

Dont forget th page's 2 of this