Author Archives: krylon

Ran into a situation where an “x” was not available for removing a USB Controller from a Guest. To resolve, first shut down the guest (if running) and temporarily Unregister it from the host. Then from the datastore, download the … Continue reading →

If you have a fresh install of a mysql server running on Debian (e.g., after running apt-get install mysql-server) you may find that any mysql client connections from other computers to your Debian server fail (one popular example is Kodi … Continue reading →

After installing open-vm-tools, ESXi reported that VMware Tools were Installed and running on the Debian 8 guest. However any attempt to gracefully power off the guest within ESXi would fail with these errors: [msg.tools.haltFailed] The request to Power off this … Continue reading →

Ran into a second error after swapping out a pass-through device in ESXi. This device was the same make and model as the previous device. Failed – Module ‘DevicePowerOn’ power on failed. * Module ‘DevicePowerOn’ power on failed. * Missing … Continue reading →

Initially the guest had a pass through HBA controller that was working well. That controller was later upgraded in the host. To update the guest with the new controller, the old pass through device was removed and the new pass … Continue reading →

During the install of FreeNAS, the process may hang with the following errors: UNMAP failed, disabling BIO_DELETE UNMAP. CDB … CAM status: SCSI Status Error SCSI status: Check Condition SCSI sense: ILLEGAL REQUEST … (Invalid field in parameter list) Command … Continue reading →

I ran into a situation where the host had crashed because of a driver problem (vmw_ahci). After changing the driver and rebooting the host, one of the guest VMs then failed to power on with the following errors: File system … Continue reading →

Upgrading from ESXi 5.5 to 6.5, performance of the host was relatively poor on a JetWay JNF9G-QM77. Guests were extremely sluggish. There were also several errors  tracked in the various logs related to the boot drive and the datastore associated … Continue reading →

If you are having trouble getting ESXi to discover a Synology iSCSI target with CHAP authentication, check your vobd log for errors that may look similar to the below: [iscsiCorrelator]: [vob.iscsi.discovery.login.error] discovery failure on vmhba64 to x.x.x.x because the target … Continue reading →

During the upgrade process from 5.5 to 6.5 (using the ISO method), I ran into the following error: CONFLICTING_VIBS ERROR: Vibs on the host are conflicting with vibs in metadata. Remove the conflicting VIBs or use Image Builder to create … Continue reading →