It is impossible to review the requirements without mentioning the lifecycle status.
(Full list in VMware Guest OS Compatibility Guide)
| Boot Device Type | Minimum Size | Notes | |----------------|--------------|-------| | Hard Disk (SAS/SATA/SCSI) | 4 GB | 8–16 GB recommended for core dumps | | USB / SD Card | 4 GB | ESXi 5.5 can log to RAM disk only (persistent logs lost on reboot) | | SSD | 4 GB | Works, but no TRIM support in 5.5 |