HP OpenVMS Systems
HP Advanced Server for OpenVMS
All text data sent between the Advanced Server and a client is in one of two formats: Unicode (UCS-2) or a client code page (OEM code page). Usually, Windows NT, Windows 2000, Windows XP, and Windows 2003 clients use Unicode. Earlier clients such as MS-DOS and Windows for Workgroups communicate using a client code page.
When the file server receives data from a client, it converts the character data from its source format to the file server's character set. If any characters in the source data cannot be converted (because the characters do not exist in the file server's character set), the server returns an error (ERROR_NO_UNICODE_TRANSLATION) to the client and records an event log entry with event number 1113. (Note that these errors should not occur in processes involving the OpenVMS Registry and the Windows NT-compatible Remote Procedure Calls (RPCs) supported by the Advanced Server, because these components fully support Unicode (UCS-2).)
Once the character data is converted, it remains in the converted format for its lifetime on the file server.
Character data in the various databases used by the Advanced Server, including the SAM, ACL, and share databases, is stored in the file server's character set.
File names are stored in one of two formats, depending on the storage
file system: ODS-2 or ODS-5.
220.127.116.11 File Name Storage and Handling on ODS-2 Volumes
ODS-2 volumes do not support Unicode characters in file names. Therefore, the Advanced Server file server resorts to storing characters in an escape-encoded format by representing unsupported characters as a sequence of supported characters in the form __XX , where XX represents a pair of hexadecimal digits corresponding to the encoded character's code point in the file server's character set.
Before the file server sends a file name from the ODS-2 volume to another system, the file server converts the __XX escape sequence back to the file server's character set. If the code point in the file server's code set at code point XX is not defined, the escape sequence is not decoded. It is returned in the file name as is.
If you plan to configure one of the alternative languages supported by the Advanced Server for OpenVMS (V7.3 and higher), and your ODS-2 disk device includes escape-encoded characters in file names, you must convert all the file names, as explained in Section 18.104.22.168, Converting File Names. Do this before configuring the new language.
On ODS-5 volumes, names are stored in either ISO-8859-1 or Unicode (UCS-2) format. In general, Unicode is used, but if a file name is composed entirely of ISO-8859-1 characters, the ISO-8859-1 format is used by the file system to save space in the directory file.
Before the file server sends a file name from the ODS-5 volume to another system, the file server converts the name from the ODS-5 format (ISO-8859-1, or UCS-2) into the server's character set, and then to either UCS-2 or the client code page for MS-DOS or Windows for Workgroups.
If a file on the ODS-5 volume has a file name containing characters that cannot be mapped to the Advanced Server character set (or to the client code page for MS-DOS or Windows for Workgroups), the file server ignores the file name and does not return it to the client system. For the client to access that file, the file name must first be changed appropriately from OpenVMS. If the file in question is contained in a directory that the client is attempting to delete, the client will not be able to delete the directory until that file is deleted from OpenVMS.
4.4.4 How to Change the Way ADMINISTER Commands Handle and Display Extended Character Set Characters
To change the way ADMINISTER commands handle Unicode or extended
character set characters (code points) with values of hexadecimal 128
or higher, use the new ADMINISTER SET MODE command with the appropriate
qualifiers. The SET MODE command also determines the OpenVMS parse
style for ADMINISTER commands entered at the DCL prompt. The qualifiers
can be the following:
|RAW||The input characters are handled as the actual characters in the Advanced Server's character set.|
|VTF7||The input characters are handled as VTF-7 characters.|
|RAW||The output characters are displayed as the actual characters in the Advanced Server's character set.|
|VTF7||The output characters are handled as VTF-7 characters.|
Settings made with the SET MODE command are preserved until you log out from the system. These settings will determine the default modes that take effect each time you invoke the ADMINISTER command interface. If you have not yet used the SET MODE command to change input or output mode settings during your present system user login session, the defaults are determined by the current OpenVMS DCL parse style. If the parse style is TRADITIONAL (the OpenVMS default), ADMINISTER command input and output modes are RAW; if the parse style is EXTENDED, ADMINISTER input and output modes are VTF7.
You can set permanent defaults by inserting the appropriate SET MODE command in your login command file. For example, to set input and output modes to VTF7, with output unfiltered, enter the following command in your LOGIN.COM file. The server does not have to be running for this command to execute.
$ ADMINISTER SET MODE/VTF7/OUTPUT=NOFILTER
To determine the current modes in effect for ADMINISTER commands, use
the ADMINISTER SHOW MODE command, as described in Section 22.214.171.124, How to Display the Current Mode Settings.
126.96.36.199 Examples: How Each Mode Affects ADMINISTER Command Input and Output
When output is set to RAW mode on a server using the Spanish language, Spanish characters are displayed as shown in the following example (assuming the terminal supports the ISO-8859-1 character set, which is used when the Spanish language is configured). In this example, only the output is changed to RAW. The default input here is VTF7. Note how the Spanish characters are handled differently on input and output.
LAPLAYA\\VALENCIA> SET MODE/OUTPUT=RAW LAPLAYA\\VALENCIA> SHOW SHARE ^BFESPA^F1OL /FULL Shared resources on server "VALENCIA": Name Type Description ------------ --------- ------------------------------------------------------- ¿ESPAÑOL Directory Path: USER1:[¿ESPAÑOL] Connections: Current: 0, Maximum: No limit RMS file format: Stream Directory Permissions: System: RWED, Owner: RWED, Group: RWED, World: RE File Permissions: System: RWD, Owner: RWD, Group: RWD, World: R Share Permissions: Everyone Full Control Total of 1 share
Note that when the input mode is VTF7, the extended character set characters for Unicode hexadecimal values 0080 to 00FF (128 to 255 decimal) can be input in either of two different formats: ^xx and ^uxxxx. Unicode hexadecimal values above 00FF (255 decimal) must be entered in the ^uxxxx format.
The following example shows how certain code point values in the Spanish language's character set are displayed when the output is set to VTF7 mode.
LAPLAYA\\VALENCIA> SET MODE/OUTPUT=VTF7 SHOW SHARE ^BFESPA^F1OL /FULL Shared resources on server "VALENCIA": Name Type Description ------------ --------- ------------------------------------------------------- ^BFESPA^F1OL Directory Path: USER1:[^BFESPA^F1OL] Connections: Current: 0, Maximum: No limit RMS file format: Stream Directory Permissions: System: RWED, Owner: RWED, Group: RWED, World: RE File Permissions: System: RWD, Owner: RWD, Group: RWD, World: R Share Permissions: Everyone Full Control Total of 1 share
To display the current input and output modes in effect, use the ADMINISTER SHOW MODE command. In the following example, the input and output modes are set to VTF7. Output is filtered.
LANDOFOZ\\TINMAN> SHOW MODE Current mode settings: Input: VTF7 Output: VTF7, FILTER
OpenVMS queue names support any uppercase and lowercase letters, digits, the underscore (_), and dollar sign ($). When you create an Advanced Server print share, specifying Unicode characters other than these supported characters, the Advanced Server creates an OpenVMS queue using the standard ODS-2 format for these characters: __XX, where XX is the 8-bit code.
Because OpenVMS restricts the length of queue names to 31 characters,
the length of Advanced Server print share names are restricted
accordingly. For example, seven characters is the maximum length for a
print share name consisting entirely of unsupported characters.
4.5 Using ODS-5 Disk Volumes in the Advanced Server Environment
With OpenVMS Version 7.2-1 and higher, you can use the Extended File Specifications feature to offer file system services that are compatible with Windows NT, Windows 2000, Windows XP and Windows 2003 file systems. To take advantage of the capabilities of Extended File Specifications, be sure to complete the following steps:
If you plan to configure one of the alternative languages supported by the Advanced Server for OpenVMS (V7.3 and higher), and your ODS-2 disk device includes escape-encoded characters in file names (characters that are in the format _XX), you must convert all the file names, as explained in Section 188.8.131.52, Converting File Names. Do this before configuring the new language. For information about language support, see Section 4.4, Unicode and Extended Character Sets. For information on configuring a new language for the server, refer to the HP Advanced Server for OpenVMS Server Installation and Configuration Guide.
To simplify share access, you may want to set up all shared disk volumes as ODS-5 disk volumes.
The Advanced Server for OpenVMS, Version 7.3 or higher, can now support 8-bit
extended character set characters for a selected set of objects, as
discussed in Section 4.4, Unicode and Extended Character Sets.
4.5.1 Requirements for Using Extended File Specifications and Extended Character Sets
To take advantage of Extended File Specifications and extended character sets, your process must be enabled for Extended File Specifications and extended character sets. By default, you cannot enter Extended File Specifications or extended character set characters in DCL command lines. To enable Extended File Specifications and extended character sets, enter the following command:
$ SET PROCESS/PARSE_STYLE=EXTENDED
Assuming the ADMINISTER SET MODE command has not been used to change the mode settings during the current user login session, the ADMINISTER interface will recognize that the process parse style was set to EXTENDED and will then allow use of extended character set characters in the ^Uxxxx and ^xx formats on input. For more information about using these characters in the ADMINISTER command interface, see Section 4.4.4, How to Change the Way ADMINISTER Commands Handle and Display Extended Character Set Characters. For more information about using Extended File Specifications and extended character sets at the DCL command level, refer to the OpenVMS Guide to Extended File Specifications.
Depending on the type of client computer, file naming conventions on
ODS-5 disk volumes differ from those on ODS-2 disk volumes as described
in the Section 184.108.40.206, Storing Files on ODS-5 Disk Volumes.
4.5.2 Managing Shares on ODS-5 Disk Volumes
When ODS-5 disk volumes are used for client file access, you manage them the same way you manage shares on ODS-2 disk volumes. In addition, you can:
The following sections describe the procedures for managing ODS-5 disk
220.127.116.11 Displaying Shares and Files on ODS-5 Disk Volumes
As with ODS-2 volumes, you can display information about a share on an ODS-5 volume --- information such as the disk device on which the share is stored, the current connections to that share, RMS file format, and permissions --- using the SHOW SHARES command with the /FULL qualifier. For example, to display information about the share STATES, enter the following command:
LANDOFOZ\\TINMAN> SHOW SHARES STATES/FULL Shared resources on server "TINMAN": Name Type Description ------------ --------- ----------------------------------------- STATES Directory Path: AABOUT$MDA1::[STATES] Connections: Current: 1, Maximum: No limit RMS file format: Stream Directory Permissions: System: RWED, Owner: RWED, Group: RWED, World: RE File Permissions: System: RWD, Owner: RWD, Group: RWD, World: R Share Permissions: Everyone Full Control Total of 1 share
You can display the files in a share on the ODS-5 disk volume, in the same way as you would on an ODS-2 volume, using the ADMINISTER command SHOW FILES. To display the contents of subdirectories as well, include the /SUBDIRECTORIES qualifier. For example, if the share STATES is on an ODS-5 disk volume, display the files in the directory [STATES.KANSAS], as well as all files in all subdirectories by entering the following command:
LANDOFOZ\\TINMAN> SHOW FILES STATES\KANSAS\* /SUBDIRECTORIES Files in: \\TINMAN\STATES\KANSAS FILE1.DAT Permissions: Administrators Full (All) Everyone Change (RWXD) Server Operators Change (RWXD) SYSTEM Full (All) Audit Events: (None specified) Owner: Scarecrow FILE2.DAT Permissions: Administrators Full (All) Everyone Change (RWXD) Server Operators Change (RWXD) SYSTEM Full (All) Audit Events: Success Failure Everyone RW---- RWXDPO Owner: Scarecrow Total of 2 files
This example displays auditing, permissions, and owner information
about all files in the shared directory KANSAS in the share STATES,
18.104.22.168 Converting File Names
After a disk volume has been converted to ODS-5, it may contain file
names with ODS-2 escape-encoded characters. These file names should be
converted to the ODS-5 nonencoded character set, using the PWCONVERT
utility, as described in HP Advanced Server for OpenVMS Server Installation and Configuration Guide.
22.214.171.124 Displaying the Disk Volume Type
To determine whether a specific disk volume is an ODS-5 disk volume, use the OpenVMS command SHOW DEVICE/FULL command, as follows:
$ SHOW DEVICE MDA1:/FULL Disk AABOUT$MDA1:, device type RAM Disk, is online, allocated, deallocate on dismount, mounted, file-oriented device, shareable. Error count 0 Operations completed 155 . . . Volume Status: ODS-5, subject to mount verification, file high-water marking, write-back caching enabled. $
The summary display line shows the type of disk volume (in this case,
126.96.36.199 Specifying File Names in ADMINISTER Commands
When you specify a file name as part of an ADMINISTER command line, you can enter the file name as it appears on the client computer, assuming your server is configured to support the same language as that supported on that client, and your workstation or terminal are configured to support the client language. Be sure to enclose the file name in quotation marks if it contains a space or other nonalphanumeric characters (such as a question mark (?), punctuation mark, and so forth). If the input mode is set to VTF7, you can enter such file names without quotation marks, using the ^xx or ^uxxxx formats for the special characters. For example, assuming the input mode is set to RAW, you can change the file permissions of the file named My File.Txt in the share LIONTAIL by entering the following ADMINISTER command:
LANDOFOZ\TINMAN>SET FILE \LIONTAIL\"My File.Txt" SCARECROW\PERMISSIONS=READ
If input mode is set to VTF7, you can also enter the space character as ^_ or ^20 (20 is the hexadecimal representation for the space character).
For information about entering such file names on the OpenVMS DCL
command line, see the appropriate OpenVMS documentation.
188.8.131.52 Storing Files on ODS-5 Disk Volumes
When clients store files on ODS-5 disk volumes, the length and characters included in the file name depend on the limitations of the software that created the file. For example, on MS-DOS clients, file names are limited to the "8.3" convention: file names can be no longer than eight characters, there must be one period to separate the file name from the file extension, and the file extension can be up to three characters. Therefore, MS-DOS clients do not take advantage of the full capabilities of the ODS-5 disk volume. ODS-5 disk volumes (as well as ODS-2) support these types of files.
Windows NT, Windows 2000, Windows XP, and Windows 2003 clients can
write longer file names, which may contain more than one period, and
have file extensions of any length within the file name length limit.
Therefore, Windows NT, Windows 2000, Windows XP, and Windows 2003
clients take advantage of the features of ODS-5 disk volumes.
184.108.40.206.1 Windows File Naming
If you are using the Advanced Server in an environment where long file names are not always supported, users should continue using MS-DOS file naming conventions. For example, if your clients are running Windows 3.11, or older Windows applications that only recognize the 8.3 file format, file names should follow the 8.3 file-naming convention; if your clients are running Windows 95, Windows 98, or Windows 2000, they can use long file names.
On Windows NT, Windows 2000, Windows XP, and Windows 2003 clients, the following names are reserved and cannot be used for files or directories on either ODS-5 or ODS-2 disk volumes: AUX, COM1, COM2, COM3, COM4, CON, LPT1, LPT2, LPT3, NUL, and PRN.
On Windows NT, Windows 2000, Windows XP, and Windows 2003 clients, file names preserve uppercase and lowercase characters, but are not case sensitive. This behavior is supported on ODS-5 volumes, and to some extent on ODS-2 volumes.