Virtual disk size is not a multiple of 1KB

KB ID: 1848
Product: Veeam Backup & Replication
Version: 6.x 7.x, 8.x, 9.x
Last Modified: 2017-03-09


Backup Copy job might fail with error:
Inline data validation detected that the target backup file is corrupted, but correction has failed

Restore job might fail with error:
Declared and actual sizes of the disk […] are different. Declared size: […]. Actual size: […]


VMDK disk is not properly aligned. Disk size is not a multiple of 1KB.

VMware does not allow creation of unaligned disks via Graphical User Interface.

Usually unaliged disks are result of P2V conversion, or disk creation via vmkfstools utility.


Please use vmkfstools utility to extend and align the disk.  Increasing the size of a virtual disk (1004047)
If the disk in question is presented as a virtual RDM, use the SAN software to properly resize the LUN. Expanding the size of a Raw Device Mapping (RDM) (1007021)

Afterwards run Backup job and make a full backup of that VM.

If the size for one of the disks on the VM is not a full integer (ex. 80.3423432 GB) increase the size of the disk within the VM configuration to a full integer (ex. 81 GB).
In some cases this error may occur on a VM whose disks is already a full integer (ex. 80 GB), try increasing the disk size to next full integer (ex. 81GB) and run the Veeam job again.


Rate the quality of this KB article: 
3.9 out of 5 based on 20 ratings

Couldn't find what you were looking for?

Below you can submit an idea for a new knowledge base article.

Request new content