fcbs(CMD) 19 June 1992 fcbs(CMD) Name fcbs - specify the number of file control blocks (FCBs) that MS-DOS can have open at the same time Syntax fcbs=x Description A file control block is a data structure that stores information about a file. Parameter x Specifies the number of file control blocks that MS-DOS can have open at one time. Valid values for x are in the range 1 through 255. The default value is 4. Notes Limitation on opening files If a program tries to open more than x files by using file control blocks, MS-DOS might close the files that were opened earlier. Recommended use of the fcbs command You should use the fcbs command only if a program requires you to do so. Most newer programs do not require file control blocks. However, some older programs might require you to use the fcbs command in your CONFIG.SYS file. Example To specify that MS-DOS can have up to eight file control blocks open at the same time, add the following line to your CONFIG.SYS file: fcbs=8