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[Bulk Archived] In the vmware.log file, you see the error: The called function cannot be performed on partial chains: please open the parent virtual disk (1017907)

Last Updated: 3/20/2024Categories: Total Views: 10833Language:
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Symptoms

Powering on the virtual machine fails if the virtual machine is not running on snapshots

Virtual machines running on snapshots power up, but the data is inconsistent and the guest operating system (OS) fails to come up if the OS is installed on the particular vmdk.

When the virtual machine is powering up, you see this error in the vmkernel.log file under /var/log:

Failed to get object 1 4 ###### 0 0 0 0 0 0 0 0 0 0 0 :Transient file system condition, suggest retry

You see these errors in the vmware.log file under /vmfs/volumes/Datastore/VMfolder:

Could not retrieve geometry.cylinders: The called function cannot be performed on partial chains. Open the parent virtual disk.

Could not retrieve geometry.biosCylinders: The called function cannot be performed on partial chains. Open the parent virtual disk.

Cause

The issue occurs if the descriptor file of the base of snapshot is corrupt or has been incorrectly recreated.

Resolution

Caution: If any snapshots depend on the original base disk, performing these steps may result in data loss. For more information, see Understanding virtual machine snapshots in VMware ESX (1015180).

If the virtual machine is not running on snapshot:

Make a backup of the .vmdk descriptor file by renaming the file.

Recreate the descriptor file of the base disk. For more information, see Recreating a missing virtual disk (VMDK) header/descriptor file (1002511).

Reattach the base disk to the virtual machine using the GUI.

Power on the virtual machine.

If the virtual machine is running on snapshot:-

Ensure that the descriptor of a delta vmdk is not missing the parentFileNameHint entry.

If the parentFileNameHint exists and points to the correct disk, recreate the descriptor file. For more information, see
Recreating a missing virtual disk (VMDK) descriptor file for delta disks (1026353).

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Recreating a missing virtual disk (VMDK) descriptor file for delta disks

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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