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Knowledge Base

Trying to clone vmdk file fails with error: read passed end of file (1009484)

Last Updated: 3/20/2024Categories: Total Views: 21298Language:
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Symptoms

The virtual machine has snapshots and has run out space on the Datastore.

Trying to clone vmdk file fails with this error
read passed end of file

You are unable to clone the virtual machine.

Resolution

This issue occurs if the virtual machine is running on a snapshot that is corrupt and needs to be discarded. If the virtual machine was in the Delete all Snapshots process other snapshots in the chain could also be affected.

To resolve this issue, locate the available snapshots and revert to a snapshot that is not corrupted by following the procedure below:

Note: It is assumed you do not have backup of the virtual machine and this is the last resort to save the data. If you do have a backup of the virtual machine you can restore the backup and perform cloning using that data.

Determine the snapshots that chain has and the sequence of the snapshots.

For example:
Base Disk: VMname.vmdk
VMname-000002.vmdk
VMname-000003.vmdk
VMname-000004.vmdk
VMname-000005.vmdk
VMname-000006.vmdk
VMname-000007.vmdk

Important: The chain may not have files in numerical sequence.

Repeat the process of cloning the virtual disk skipping one snapshot every time until the operation completes successfully.

For example:
# vmkfstools -i VMname-000007.vmdk clone.VMname.vmdk
fails
# vmkfstools -i VMname-000006.vmdk clone.VMname.vmdk
fails
# vmkfstools -i VMname-000005.vmdk clone.VMname.vmdk
success

Warning: Skipping snapshots may lead to data loss.

If the virtual machine was not consolidating snapshots you can see the date of the snapshot that the virtual machine will revert to, from the modification dates of the *-delta* files.

For example:
# ls -l *flat*
-rw------- 1 root root 42949672960 Apr 10 10:50 VMname-flat.vmdk
-rw------- 1 root root 72960 Apr 11 10:50 VMname-000002-delta.vmdk
-rw------- 1 root root 672960 Apr 12 10:50 VMname-000003-delta.vmdk
-rw------- 1 root root 672960 Apr 13 10:50 VMname-000004-delta.vmdk
-rw------- 1 root root 672960 Apr 14 10:50 VMname-000005-delta.vmdk
-rw------- 1 root root 672960 Apr 16 10:50 VMname-000006-delta.vmdk
-rw------- 1 root root 672960 Apr 17 10:50 VMname-000007-delta.vmdk

Cloning from VMname-000005-delta.vmdk the virtual machine will revert to Apr 14.

Detectable by VMware SkylineTM

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

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Download and Install VMware Fusion (2014097)

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