7.0

Table Of Contents
Table 5-1. ESXi 7.0 system storage partitions: (continued)
Partition Use Type
Boot-bank 1 System space to store ESXi boot modules. FAT16
ESX-OSData Acts as the unified location to store additional modules.
Not used for booting and virtual machines.
Consolidates the legacy /scratch partition, locker partition for VMware Tools, and
core dump destinations.
Caution Always create ESX-OSData partitions on persistent storage device that is not
shared between ESXi hosts. Use USB, SD and non-USB flash media devices only for
boot bank partitions.
VMFS-L
The ESX-OSData volume is divided into two high-level categories of data, persistent and non-
persistent data. Persistent data contains of data written infrequently, for example, VMware Tools
ISOs, configurations, and core dumps.
Non-persistent data contains of frequently written data, for example, logs, VMFS global traces,
vSAN Entry Persistence Daemon (EPD) data, vSAN traces, and real-time databases.
Figure 5-1. Consolidated system storage in ESXi 7.0 and later
boot-bank 0
system boot
boot-bank 1
small core-dump
scratch
VMFS datastore
boot-bank 0
system boot
boot-bank 1
VMFS datastore
ESX-OS Data
ROM data RAM data
4 MB
250 MB
250 MB
110 MB
286 MB
2.5 GB
4 GB
(created if media > 8.5 GB
not created on USB flash drive)
locker
large core-dump
(created if media > 3.4 GB)
ESXi 6.x
system storage layout
ESXi 7.0
system storage layout
100 MB
500 MB to 4 GB,
(depending on the
size of the used
boot media)
500 MB to 4 GB,
(depending on the
size of the used
boot media)
remaining space,
up to 128 GB
remaining space,
(for media size > 142 GB)
ESXi 7.0 System Storage Sizes
Partition sizes, except for the system boot partition, can vary depending on the size of the boot
media used. If the boot media is a high-endurance one with capacity larger than 142 GB, a VMFS
datastore is created automatically to store virtual machine data.
VMware ESXi Installation and Setup
VMware, Inc. 12