Different types of vSphere installations
There are many ways to install ESXi in your environment. They are listed and discussed next.
Fresh installation
VMware ESXi requires a 64-bit server, for example AMD Opteron or Intel Xeon. The server can have up to 320 logical CPUs (cores or threads) for vSphere 5.5 and can support up to 4096 virtual CPUs per host, which requires a minimum of 4 GB of memory. An ESXi host can have up to 4TB of memory. These limitations vary depending on the vSphere release. They are listed in detail in the "Configuration Maximums" document for the particular software release.
ESXi can be installed on Flash cards, USB storage and SATA, SCSI and SAS disk drives.
To begin a fresh installation of ESXi, follow the steps listed next: ...
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