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VMware upgrade fails with "Cannot create a ramdisk"

Karen Jones
Karen Jones asked
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Last Modified: 2019-04-04
When I try to upgrade a VMware host, the upgrade fails with "Cannot create a ramdisk of size 341MB to store the upgrade image. Check if the host has sufficient memory."
The host is a ProLiant DL360p Gen8.

The machine has 64 GB of RAM and all the guests are shut down.

This is what I have tried so far, based on Google:
  • Setting the host into maintenance mode
  • Rebooting the host
  • The ScratchConfig.ConfiguredScratchLocation is set to a local SSD, which has nearly 1 TB free.

What else can I try  please?
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Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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Commented:
This can happen with a HPE OEM version of ESXi, because they've not left enough space on the partition for the upgrade.

if  move the scratch location to a datastore, this should solve the issue.
Murali SripadaVMware Engineer | vExpert 18/19/20
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Distinguished Expert 2018

Commented:
take ssh and run the command vdf -h and df -h commands and share the output please or verify if anything is showing 100 percent
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