SCO OpenServer支持Versioning Filesystems(undelete),但是缺省卻沒有打開此項功能，下面是具體細節(jié)：
1) scoadmin中選擇Hardware/Kernel Manager，選擇Filesystem configuration，
設置MAXVDEPTH為一個非零值(n=保存多少以前版本，設置較大數(shù)時要考慮磁盤空間)
設置MINVTIME(文件versioned之前等待的秒數(shù))
2) 重新編譯(Relink)內核；
3) 重新啟動服務器；
4) 啟用Undelete，針對需要設置undelete的目錄(例如:/u/data)
undelete -s /u/data
5) 為了察看Versioned情況,設置以下環(huán)境變量：
SHOWVERSIONS=1; export SHOWVERSIONS
6) 用文件察看命令察看Versioned的文件，可以根據(jù)需要恢復刪除或覆蓋的文件 。
【undelete SCO UNIX下的反刪除】
undelete supports the following options:If the -l, -p, -s, -u and -v options are not specifIEd, undelete recovers the specified files.
-l
print a listing of all versions of the specified file(s)-p
purge (permanently delete) specified source file(s)-s
turn the version attribute on for the specified Directories and its subsequent child directories-u
turn the version attribute off for the specified directories-v
force the specified file(s) to be versionedThe following additional options are recognized:-d
normally, if the specified file is a directory, undelete will operate on the files contained in that directory. If this option is specified, undelete operates on the directory itself.
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NOTE: undelete does not work on directories that are mounted.
---------------------------------------------------------------------------------i
undelete will prompt for confirmation prior to recovering a file that will overwrite the current version of the file. A y answer means that the undeletion should proceed. Any other answer prevents undelete from undeleting the file.-f
undelete will recover the file(s) without prompting even if it is overwriting over an existing current version of the file. This option overrides the -i option. Note that this is the default if the standard input is not a terminal.-r
undelete will operate recursively on any directories in the argument list. Symbolic links that are encountered with this option will not be traversed.-m [ -]days
undelete will only consider files that were deleted less than ( - ), greater than () or exactly (neither - nor) days ago.
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