补充说明一下,只有 MS-DOS 6.22 版的才自带 UNFORMAT, UNDELETE 等外部命令,MS-DOS 7.10 版已经取消了这些命令,DOS 联盟网站上下载的 7.10 版中的 UNFORMAT, UNDELETE 其实是 Noton Utilities 中的。
http://www.cn-dos.net/forum/viewthread.php?tid=39051
It is supplemented that only the MS-DOS 6.22 version comes with external commands such as UNFORMAT, UNDELETE, etc. The MS-DOS 7.10 version has removed these commands. The UNFORMAT, UNDELETE in the 7.10 version downloaded from the DOS Union website are actually from Noton Utilities.
http://www.cn-dos.net/forum/viewthread.php?tid=39051