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$HOME: permanent/backed up, user specific, local
This is a local area where you are placed after the login procedure. It is where system and user applications store their dot-files and dot-directories (.nwchemrc, .ssh, ...) and where users keep initialization files specific for the systems (.cshrc, .profile, ...). There is a $HOME area for each username on the machine.
This area is conceived to store programs and small personal data. It has a quota of 50 GB. Files are never deleted from this area, moreover they are guaranteed by daily backups: if you delete or accidentally overwrite a file, you can ask our Help Desk (superc@cineca.it) to restore it. A maximum of 3 versions of each file are stored as a backup. The last version of the deleted file is kept for two months, then definitely removed from the backup archive. File retention is related to the life of the username, data are preserved until the username remains active.
$WORK: permanent, project specific, local
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There is one $WORK area for each active project on the machine. Default quota is 1 TB per project, but extensions can be considered by Help Desk (mailto: superc@cineca.it) if motivated. Owner of the main directory is the PI (Principal Investigator) of the project, all collaborators are allowed to read/write in there. Collaborators are advised to create a personal directory in $WORK for storing their personal files. By default the personal directory will be protected (only the owner can read/write), but protection can be easily modified, for example by allowing write permission to project collaborators through chmod command. This second approach does not affect global files security.
A newly defined command The (chprj - change project) command makes it easier to manage the different WORK areas for different projects, see here for details.
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