Usage:
/usr/bin/vmdk-convert -i [--detailed] src.vmdk: displays information for specified virtual disk
/usr/bin/vmdk-convert --get-descriptor src.vmdk: prints the descriptor file content to stdout
/usr/bin/vmdk-convert [-c compressionlevel] [-n threads] [-t toolsVersion] [--noreorder] [-s size] src.vmdk dst.vmdk: converts source disk to destination disk with given tools version

-c <level> sets the compression level. Valid values are 1 (fastest) to 9 (best). Only when writing to VMDK. Current is 9.
-n <threads> sets the number of threads used for compression level. Only when writing to VMDK. Current is 64.
-s, --sector-size <size> sets the sector size which will be written to the descriptor file unless it is 0. Current is 0.
--detailed shows detailed sparse extent header information (only with -i)
--get-descriptor prints the descriptor file content to stdout
--noreorder disables grain reordering after compression (default: reordering enabled)