Backing-up blocks from virtual disks in different virtual machine environments having different block lengths to a common data format block length

A system for storing data from virtual disks including a first virtual disk and a second virtual disk to a backup storage, comprising:

• a processor;
• and
• at least one computer readable storage medium including program instructions that when executed by the processor cause operations, the operations comprising:
• performing incremental backups of the first virtual disk in a first virtual machine environment that backs-up only data changed since a last backup to store in a common data format in the backup storage, wherein blocks in the first virtual disk in the first virtual machine environment have a common data format block length of blocks in the common data format in the backup storage;
• issuing multiple reads to blocks of data in a second virtual disk in a second virtual machine environment having a block length that differs from the common data format block length;
• and
• writing the read blocks of data in the second virtual disk to blocks in the backup storage having the common data format block length to backup the blocks of data in the second virtual disk.

A method for storing data from virtual disks, comprising:

• performing incremental backups of a first virtual disk in a first virtual machine environment in the first virtual machine environment that backs-up only data changed since a last backup to store in a common data format in a backup storage, wherein blocks in the first virtual disk have a common data format block length of blocks in the common data format in the backup storage;
• issuing multiple reads to blocks of data in a second virtual disk in a second virtual machine environment having a block length that differs from the common data format block length;
• and
• writing the read blocks of data in the second virtual disk to blocks in the backup storage having the common data format block length to backup the blocks of data in the second virtual disk.