HP d640 HP D640 High-Volume Printer - Enhanced Features Manual, C5620-90027 - Page 54

Before you create files with long names, consider the following: l HP strongly recommends that characters used in filenames be confined to the ASCII printing set - excluding characters used as punctuation symbols or wildcards. The following printing characters are excluded in DOS and MS Windows: Operating system DOS Windows 95 or NT Excluded Characters The D640 filing system does not enforce these restrictions. However, you may encounter problems when protocol commands refer to filenames with excluded characters. l Files and directories with long filenames have an additional abbreviated name which is DOS-compatible (8.3 characters). In any context, files and directories may be specified by either the long name or the abbreviated name. l The limit on a file or directory name (including all extensions) is 100 characters. l There is an absolute upper limit of 255 characters on a complete pathname (including drive specifier). l Other practical constraints, such as the size of fields on the printer's control panel and in directory listings, should also be considered. l In terms of storage space and file access speed, long filenames are significantly less efficient than standard names. Lowercase in filenames The D640 printer supports filenames that include both lowercase and uppercase letters. Filenames are no longer converted to uppercase. As with MS Windows, case is not significant for matching names. Two strings which differ only in case are considered to be the same name. (For example, name.ext and NaME.Ext). This rule applies to both standard and long filenames. 50 Chapter 3: Technical Reference