Disc Space for Files and Xltrim
MPE/iX cannot operate on a file unless it has about 256 sectors of disc space allocated to it. As a result, Qedit files which used to occupy 30 sectors often occupy 256 sectors or more. In effect, the minimum extent size increases dramatically. MPE/iX has enhanced the FCLOSE intrinsic to deal with this problem. If you specify bit 11 of the close options parameter, MPE/iX releases the disc space beyond the EOF while the file is not in use. Qedit uses this option, which is operational in version 1.1 of MPE XL.
See also the Xltrim command, which allows you to trim back unneeded disc space for a group of files in a single command.