VSAN best practices related question

[ManivelR]

Hi All,

I have a doubt about VSAN RAID controller queue depth & write cache.

1) We are using Dell PERC H710 RAID controller. Is there any recommended queue depth available to this H710 controller ? By default it is 64. May i know what is the recommended value to reset the queue depth? It is 256 or more ?

2) Do we need to disable write cache from this RAID controller ?  i have not seen any options to disable. Is this must ?

Thanks you in advance.

Manivel Rajarathinam.

[Darking]

The h710 controller is not supported on current releases of vsan.

What release are you running?

I would recommend a h330 hba since it's well supported

[TheBobkin · Accepted solution]

Hello Manivel,

"Is there any recommended queue depth available to this H710 controller ? By default it is 64. May i know what is the recommended value to reset the queue depth? It is 256 or more ?"

You want the QD set as high as possible - 975 for a H710P controller, though do note that this is not a great controller and I would advise acquiring something more modern if possible.

"Do we need to disable write cache from this RAID controller ?  i have not seen any options to disable. Is this must ?"

The cache should be set to 100% read or disabled - this should be configurable in the BIOS.

Bob

[ManivelR]

Thanks so much Bob.Right now we have this controller only h710.I already told to get another recommended controller and awaiting response.

I mistakenly sent as 64(QD) and it is currently pointed as 971(i checked in ESXTOP--->D--).It is the maximum one.

Sure i will check on BIOS once(write cache).

Thanks,

Manivel R