Dimensions - 16.25' high x 3.75' wide. Required length - 18.69' As mentioned earlier, the height of the slot port effects the acoustical length so i reversed the dimensions-1 slot port. Dimensions - 3.75' high x 16.25' wide. Required length - 12.44' The port for both calculations is using 3 walls of the box for the port. To figure your port, square/slot/round and different tunings for your box, try here. Select Loudspeakers-101 and then check fro that menu (design port/s) and click on that. Some very basic info is given, and a calculator is their for giving you the deminsions you'ed need for a particular tuning using round, square or slot port/s.

You can expand your PC internally by adding additional circuitry boards. Those boards, or expansion cards, plug directly into expansion slots on the motherboard (as shown in this figure). So, you can expand your computer system by adding options not included with the basic PC. Here are the types of expansion slots your PC may have:

• PCI Express: The best type of expansion slot to have in your PC is the PCI Express, also written as PCIe. Without boring you, the PCI Express type of expansion slot communicates with the motherboard, and therefore with the microprocessor, both quickly and efficiently.

• PCI: The PCI slot is the most common form of internal expansion for a PC.

  Some PCs have a mixture of PCI and PCI Express slots. If so, go with PCI Express when you have that option.

• AGP: This type of expansion slot was specifically designed to deal with graphics adapters. In fact, AGP stands for Accelerated Graphics Port. Older PCs may sport this expansion slot, but the best video cards use PCI Express.

• ISA: The most ancient type of expansion slot is the ISA, which stands for (get this) Industry Standard Architecture. That’s because it never really had a name until another, better type of expansion slot came along. ISA slots hang around to be compatible with older expansion cards.

What is VMware HA Slots ?

“VMware HA slots is a logical representation of the memory and CPU resources that satisfy the requirements for any powered-on virtual machine in the cluster.”

If you have configured reservations at VM level, It influence the HA slot calculation. Highest memory reservation and highest CPU reservation of the VM in your cluster determines the slot size for the cluster.

Here is the Example,

If you have the VM configured with the highest memory reservation of 8192 MB (8 GB) and highest CPU reservation of 4096 MHZ. among the other VM’s in the cluster, then the slot size for memory is 8192 MB and slot size for CPU is 4096 MHZ. in the cluster.

If no VM level reservation is configured , Minimum CPU size of 256 MHZ and memory size of 0 MB + VM memory overhead will be considered as CPU and Memory slot size.

Calculation for Number of HA Slots in cluster :-

Once we got the Slot size for memory and CPU by the above method , Use the below calculation

Num of CPU Slots = Total available CPU resource of ESX or cluster / CPU Slot Size

Num of memory slots = Total available memory resource of ESX or cluster minus memory used for service console & ESX system / Memory Slot size

Let’s take a Example,

I have 3 host on the cluster and 6 Virtual machine is running on the cluster and Each host capacity as follows

RAM = 50 GB per Host

CPU = 8 X 2.666 GHZ per host

Cluster RAM Resources = 50 X 3 = 150 GB – Memory for service console and system = 143 GB

Cluster CPU resources = 8 X 2.6 X 3 = 63 GHZ (63000 MHZ) of total CPU capacity in the cluster – CPU Capacity used by the ESX System = 60384 MHZ

How To Determine Slot Port Size Calculator

I don’t have any memory or CPU reservation in my cluster, So, the default CPU slot size 256 MHZ and one of my Virtual machine is assigned with 8 vcpu and its memory overhead is 344.98 MB (which is the highest overhead among my 6 virtual machines in the cluster)

How To Determine Slot Port Size 10

Let’s calculate the num of CPU & Memory slots

Num of CPU Slots = Total available CPU resource of cluster / CPUSlot size in MHZ

How To Determine Slot Port Sizes

No of CPU Slots = 60384 MHZ / 256 MHZ = 235.875 Approx

Num of Memory Slots = Total available Memory resource of cluster / memory Slot Size in MB

Num of Memory Slots = 146432 / 345 = 424 Approx

The most restrictive number among CPU and Memory slots determines the amount of slots for this cluster. We have 235 slots available for CPU and 424 Slots available for Memory. So the most restrictive number is 235.

So, Total number of slots for my cluster is 235 Approx. Please find the below snapshot

Please refer my blog post on Understanding Total Slots, Used Slots & Available slots in VMware HA Slot to understand Total Slots, Used Slots & Available slots. I hope this article is helpful to you to understand HA slots calculation. Thanks for Reading!!. Be social and share it in social media, if you feel worth sharing it.