vsphere-esxi-vcenter-server-55-storage-guide

vSphere StorageVerify a Diagnostic PartitionUse the esxcli command to verify whether a diagnostic partition is set.In the procedure, --server=server_name specifies the target server. The specified target server prompts youfor a user name and password. Other connection options, such as a configuration file or session file, aresupported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.PrerequisitesInstall vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started withvSphere Command-Line Interfaces. For troubleshooting, run esxcli commands in the ESXi Shell.ProcedureuList partitions to verify that a diagnostic partition is set.esxcli --server=server_name system coredump partition listIf a diagnostic partition is set, the command displays information about it. Otherwise, the command showsthat no partition is activated and configured.Move the Coredump to a FileSystem size increases lead to larger ESXi core dumps. The coredump partition for new installations of ESXi5.5 is 2.5GB. For upgrades from previous releases to ESXi 5.5, the core dump partition is limited to 100MBfor ESXi crashes. For many large systems, this limit is not enough space and the core dump log files aretruncated. The limit has an impact on the ability to triage ESXi system and kernel issues.For upgrades with limits on 100MB partitions, during the boot process the system might create a dump file.If it does not create a dump file, you can manually create one with the esxcli system coredump filecommand.Procedure1 Create a VmKernel VMFS datastore dump file.esxcli system coredump file add2 Retrieve the current dump file configuration.esxcli system coredump file get3 Disable the core dump file.esxcli system coredump file set -e false4 Find and enable the active coredump file.esxcli system coredump file set --smart --enable true5 Unconfigure the VMFS dump file:esxcli system coredump file set --unconfigure6 Remove the coredump file.The --force option deactivates and unconfigures the removed file.esxcli system coredump file remove --force150 VMware, Inc.