Last week I installed some new vSphere hosts with flash disk storage. Some hosts has a yellow caution icon and a message stating:
Configuration Issues – System logs on host [hostname] are stored on non-persistent storage.
Verify the location of System logs:
- In vSphere Client, select the host in the inventory panel.
- Click the Configuration tab, then click Advanced Settings under Software.
- Ensure that Syslog.global.logDir points to a persistent location.
The directory should be specified as [datastorename] path_to_file where the path is relative to the datastore. For example, [datastore1] /systemlogs.
- If the Syslog.global.logDir field is empty or explicitly points to a scratch partition, make sure that the field ScratchConfig.CurrentScratchLocation shows a location on persistent storage.
After a few minutes the logs are stored at the new location (in this case I used central storage):
More information: VMware
Today I tried to delete a virtual machine with more then 100 (damn Backup Exec) snapshots, in the vSphere Client I selected in the inventory: “Delete from disk” , few seconds later I received this error message:
Cannot complete the operation due to an incorrect request to the server
Events directly at the vSphere 5.0 host:
Warning message from ESXHOST: This virtual machine has more than 100 redo logs in a single branch of its snapshot tree. Deleting some of the snapshots or consolidating the redo logs will improve performance. The maximum number of redo logs supported is 255.
Virtual machine disks consolidation failed.
With this simple PowerCLI command I was able to remove the virtual machine include all active snapshots
Remove-VM "VM" -DeletePermanently -Confirm:$false
Xtravirt published vLogView 184.108.40.206, with this tool you can view/search easy in VMware ESX events, by connecting vCenter server you can add multiple hosts and download the logfiles for some troubleshooting.