通过vmware workstation软件创造出来的虚拟机，在虚拟机目录下有时会出现多个以vmdk后缀名结尾的文件，多个文件占用的空间都很大，感觉很乱，并且这样虚拟机运行的效率也很低。
出现这种情况的原因是在创建虚拟机时，在指定硬盘容量时，选择了Split virtual disk into multiple files，并且下面有说明，这种多个文件模式更易于将虚拟机转移到其他的电脑上，并且会降低性能且会占用更多的硬盘空间。
如果选择Store virtual disk as a single file模式，虚拟机就会在一个文件中，不仅会提高性能减少占用硬盘空间，而且看着更舒服。
但是这两个模式之间可以转换吗，通过vmware workstation自带的一个工具就可以做到。
在vmware workstation的安装目录下，有一个vmware-vdiskmanager.exe文件，在命令行下执行，可以看到这个软件的用法，如下：
VMware Virtual Disk Manager – build 471780.
Usage: vmware-vdiskmanager.exe OPTIONS <disk-name> | <mount-point>
Offline disk manipulation utility
Operations, only one may be specified at a time:
-c : create disk. Additional creation options must
be specified. Only local virtual disks can be
created.
-d : defragment the specified virtual disk. Only
local virtual disks may be defragmented.
-k : shrink the specified virtual disk. Only local
virtual disks may be shrunk.
-n <source-disk> : rename the specified virtual disk; need to
specify destination disk-name. Only local virtual
disks may be renamed.
-p : prepare the mounted virtual disk specified by
the mount point for shrinking.
-r <source-disk> : convert the specified disk; need to specify
destination disk-type. For local destination disks
the disk type must be specified.
-x <new-capacity> : expand the disk to the specified capacity. Only
local virtual disks may be expanded.
-R : check a sparse virtual disk for consistency and atte
mpt
to repair any errors.
-e : check for disk chain consistency.
-D : make disk deletable. This should only be used on di
sks
that have been copied from another product.
Other Options:
-q : do not log messages
Additional options for create and convert:
-a <adapter> : (for use with -c only) adapter type
(ide, buslogic, lsilogic). Pass lsilogic for other a
dapter types.
-s <size> : capacity of the virtual disk
-t <disk-type> : disk type id
Disk types:
0 : single growable virtual disk
1 : growable virtual disk split in 2GB files
2 : preallocated virtual disk
3 : preallocated virtual disk split in 2GB files
4 : preallocated ESX-type virtual disk
5 : compressed disk optimized for streaming
6 : thin provisioned virtual disk – ESX 3.x and above
The capacity can be specified in sectors, KB, MB or GB.
The acceptable ranges:
ide adapter : [1MB, 2040.0GB]
scsi adapter: [1MB, 2040.0GB]
ex 1: vmware-vdiskmanager.exe -c -s 850MB -a ide -t 0 myIdeDisk.vmdk
ex 2: vmware-vdiskmanager.exe -d myDisk.vmdk
ex 3: vmware-vdiskmanager.exe -r sourceDisk.vmdk -t 0 destinationDisk.vm
dk
ex 4: vmware-vdiskmanager.exe -x 36GB myDisk.vmdk
ex 5: vmware-vdiskmanager.exe -n sourceName.vmdk destinationName.vmdk
ex 6: vmware-vdiskmanager.exe -r sourceDisk.vmdk -t 4 -h esx-name.mycomp
any.com \
-u username -f passwordfile “[storage1]/path/to/targetDisk.vmdk”
ex 7: vmware-vdiskmanager.exe -k myDisk.vmdk
ex 8: vmware-vdiskmanager.exe -p <mount-point>
(A virtual disk first needs to be mounted at <mount-point>)
用法已经说的很清楚了，这里假设需要转化的虚拟机位于F:windows.vmdk，那么通过以下命令操作来实现将多个vmdk文件转化成一个文件：
vmware-vdiskmanager.exe -r “F:\windows.vmdk” -t 0 “F:\b.vmdk”
注意目标文件和源文件名不能一样，转换后原有虚拟机仍然存在，删除并新建后，使用现有磁盘添加新的vmdk文件即可。