zip == "$ disk:[dir]zip.exe
The following command puts file.dsk into a zip archive named file.zip while preserving VMS file attributes and using better compression.
zip "-V9" file.zip file.dsk
$ zip Copyright (c) 1990-2008 Info-ZIP - Type 'zip "-L"' for software license. Zip 3.01 (October 6th 2014). Usage: zip == "$ disk:[dir]zip.exe" zip [-options] [-b path] [-t mmddyyyy] [-n suffixes] [zipfile list] [-xi list] The default action is to add or replace zipfile entries from list, which can include the special name - to compress standard input. If zipfile and list are omitted, zip compresses stdin to stdout. -f freshen: only changed files -u update: only changed or new files -d delete entries in zipfile -m move into zipfile (delete OS files) -r recurse into directories -j junk (don't record) directory names -0 store only -l convert LF to CR LF (-ll CR LF to LF) -1 compress faster -9 compress better -q quiet operation -v verbose operation/print version info -c add one-line comments -z add zipfile comment -@ read names from stdin -o make zipfile as old as latest entry -x exclude the following names -i include only the following names -F fix zipfile (-FF try harder) -D do not add directory entries -A adjust self-extracting exe -J junk zipfile prefix (unzipsfx) -T test zipfile integrity -X eXclude eXtra file attributes -C preserve case of file names -C- down-case all file names -C2 preserve case of ODS2 names -C2- down-case ODS2 file names* (*=default) -C5 preserve case of ODS5 names* -C5- down-case ODS5 file names -V save VMS file attributes (-VV also save allocated blocks past EOF) -w store file version numbers -ww store file version numbers as ".nnn" -y store symbolic links as the link instead of the referenced file -e encrypt -n don't compress these suffixes -h2 show more help (Must quote upper-case options, like "-V", unless SET PROC/PARSE=EXTEND)