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block size configure for VMware

During configuring the RAID card, what block size should normally be assigned before installing VMware host, Should I use 4 K or 8K ?

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AXISHK
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AXISHK
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
I would not recommend installing the OS directly onto disks, and use an USB flash drive or SD card for the OS installation, only requires 1GB space, and then use all your storage (disk) space for VMFS datastore.

Here is the VMware KB on installing 5.0 on USB/SD:
http://kb.vmware.com/kb/2004784

As for your question, I would consult the following "Oracle on Storage"

I would read this EE Question, Answered by dlethe, and read dlethe comments.

http://www.experts-exchange.com/Hardware/Components/Q_28163533.html#a39265868

http://www.experts-exchange.com/Hardware/Components/Q_28163533.html#a39265922

http://www.experts-exchange.com/Hardware/Components/Q_28163533.html#a39600527
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coolsport00Commented:
And, an article I always recommend to folks, as some (still) don't know, or just forget, all the disk layers needing addressed as far as alignment/block size:

http://www.blueshiftblog.com/?p=300

Thankfully VMware addressed its layer with v5.x & only having 1 block size (thus making it an area to not have to configure).

Regards,
~coolsport00
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AXISHKAuthor Commented:
So for configuring the RAID card, it doesn't matter whether to configure the array block in 4K, 8K , etc ?

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's not going to make a lot of difference, to your performance!

The actual RAID type, e.g. RAID 10, RAID 1, RAID 5 or RAID 6 is going to make more difference.
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coolsport00Commented:
The main thing is to at least keep it in 4KB chunks to be aligned with your virtual & OS layers, but in the grand scheme of things, you won't notice much of any perf issues.

~coolsport00
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