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Table Of Contents
You might want to override this default behavior if, for example, you use shared storage devices
instead of local storage. To prevent automatic disk formatting, detach the local storage devices
from the host under the following circumstances:
n Before you start the host for the first time.
n Before you start the host after you reset the host to the configuration defaults.
To override the VMFS formatting if automatic disk formatting already occurred, you can remove
the datastore. See the
vCenter Server and Host Management
documentation.
About the Scratch Partition
For new installations of ESXi, during the autoconfiguration phase, a scratch partition is created on
the installation disk if it is a high-endurance device such as a hard drive or SSD.
Note Partitioning for hosts that are upgraded to ESXi 7.0 and later from earlier versions differs
significantly from partitioning for new installations of ESXi. The size of bootbank partitions is
different and autoconfiguration might not configure a coredump partition on the boot disk due to
size limitations.
When ESXi boots, the system tries to find a suitable partition on a local disk to create a scratch
partition.
The scratch partition is not required. It is used to store system logs, which you need when you
create a support bundle. If the scratch partition is not present, system logs are stored in a ramdisk.
In low-memory situations, you might want to create a scratch partition if one is not present.
The scratch partition is created during installation. Do not modify the partition.
If no scratch partition is created, you can configure one, but a scratch partition is not required.
You can also override the default configuration. You can create the scratch partition on a remote
NFS-mounted directory.
Set the Scratch Partition from the vSphere Client
If a scratch partition is not set up, you might want to configure one, especially if the host is low on
memory. When a scratch partition is not present, system logs are stored in a ramdisk.
Prerequisites
The directory to use for the scratch partition must exist on the host.
Procedure
1 From the vSphere Client, connect to the vCenter Server.
2 Select the host in the inventory.
3 Click the Configure tab.
4 Select System.
VMware ESXi Installation and Setup
VMware, Inc. 16