使用virtualbox的动态磁盘，提示磁盘满，日志如下：
00:04:10.328 VM: Raising runtime error 'DevATA_DISKFULL' (fFlags=0x0)
00:04:10.328 Console: VM runtime error: fatal=false, errorID=DevATA_DISKFULL message="Host system reported disk full. VM execution is suspended. You can resume after freeing some space"
00:04:10.329 Changing the VM state from 'RUNNING' to 'SUSPENDING'.
00:04:10.730 Changing the VM state from 'SUSPENDING' to 'SUSPENDED'.
00:04:10.731 PIIX3 ATA: Ctl#0: redo DMA operation
分析宿主硬盘是FAT32格式的，单个文件最大4G,当动态磁盘文件达到4G，就出现该问题。
解决：
把宿主硬盘从FAT32转化为NTFS格式。