RAM Disk full on ESXi host
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Sometime we used to get issue where were are not able to perform vMotion or logging was unable to write under /var/log.. While trying to do some normal things – like vMotion. I noticed an error which states just “A general system error occurred.” On further investigation, I found that the underlying message was an out of disk space message while trying to proceed with a Storage vMotion.Observations during issue
While vMotion – “A general system error occurred:”While performing Storage vMotion – “/var/log/vmware/journal/xxxx error writing file. There is no space left on the device.”Steps during troubleshooting
- Go to Configuration tab on host in vCenter client, go to Security Profile, click Properties link on the Services section.
- Scroll down to SSH and highlight – click options – click start to start SSH service.
- Use putty or reflections to ssh to the host.
- If you get a connection rejected – root filesystem ramdisk is probably full.
- Go to console (either through KVM or OA for blades)
- F2 to login, login, arrow down to Troubleshooting Options, select Enable ESXi Shell.
- Press ALT-F1 to change to management shell and login (same root credentials).
- Run ‘vdf -h’ and look for root filesystem – should look like:
Ramdisk Size Used Available Use% Mounted on
root 32M 3M 28M 10% -- - If it is 0M available and 100% used, that’s the problem. Try to clear up space:
cd /var/log/
ls -la - Check size of the hpHelper.log file – likely pretty large. Reset the file, if large.
> hpHelper.log
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