HP OpenVMS Systems Documentation

HP OpenVMS System Management Utilities Reference Manual

SHUTDOWN shuts down the system and awaits a manual reboot. To use the new system parameter values generated in the SETPARAMS phase, specify either SHUTDOWN or REBOOT as the end phase. You can define the logical name AGEN$SHUTDOWN_TIME (using the DCL command DEFINE) to specify the number of minutes before shutdown occurs.

SHUTDOWN requires the SETPRV privilege.

6.4.8 REBOOT

REBOOT automatically shuts down and reboots the system, thus installing the new parameter values. To install the new system parameter values generated in the SETPARAMS phase, specify either SHUTDOWN or REBOOT as the end phase. You can define the logical name AGEN$SHUTDOWN_TIME (using the DCL command DEFINE) to specify the number of minutes before shutdown occurs.

REBOOT requires the SETPRV privilege.

6.4.9 HELP

HELP displays help information about AUTOGEN to the screen. The HELP phase is only valid as the start phase command line parameter. When you specify HELP for the start phase, the end phase and execution mode parameters are ignored.

6.5 Execution Modes

Specify an execution mode when you invoke AUTOGEN to control how AUTOGEN uses feedback. Table 6-2 lists the execution-mode options.

Table 6-3 lists the files AUTOGEN uses during each phase.

The AUTOGEN command procedure runs automatically when your system is installed or upgraded to set appropriate values for system parameters and sizes for system page, swap, and dump files.

Execute AUTOGEN to reset system parameter values and system file sizes. The new values and file sizes take effect the next time the system is booted.

Format

@SYS$UPDATE:AUTOGEN [start-phase] [end-phase] [execution-mode]

Parameters

start-phase

Specify the phase where AUTOGEN is to begin executing. Table 6-1 lists the options for the end-phase parameter.

The phase specified for start-phase must either precede or be identical to the phase specified for end-phase, according to the sequence shown in Table 6-1. If you do not supply an option for the start-phase parameter, enter a null argument (that is, "" ). If you do not specify a start phase, GENPARAMS is the default.

end-phase

Specify the phase where AUTOGEN is to complete executing. Table 6-1 lists the options for the end-phase parameter. If you do not specify an end phase, the end phase has the same value as the start phase by default.

execution-mode

Specify one of the following execution-mode options to control how AUTOGEN uses feedback:

• FEEDBACK
• NOFEEDBACK
• CHECK_FEEDBACK
• Blank

Table 6-2 describes each execution-mode option.

Description

To invoke AUTOGEN, use the following syntax to enter a command at the DCL command prompt:

$ @SYS$UPDATE:AUTOGEN [start-phase] [end-phase] [execution-mode]

You are returned to DCL level when the command has finished processing unless you specify SHUTDOWN or REBOOT as the end-phase parameter.

7.1 BACKUP Description

When you save files with BACKUP, it writes the files to a special file called a save set. Save sets are written in a format that only BACKUP can interpret. (A save set stored on a Files--11 disk is a standard OpenVMS file, however, and can be copied, renamed, deleted, or backed up. A save set stored on magnetic tape should only be processed with the BACKUP command; do not use the DCL command COPY to copy a magnetic tape save set to disk.)

Use BACKUP to perform the following tasks:

• Save disk files to a BACKUP save set.
• Restore files to disk from a BACKUP save set.
• Copy disk files to disk files.
• Compare disk files created by BACKUP or files in a BACKUP save set with disk files.
• List information about the files in a BACKUP save set.
• Create and list journal files that record the results of BACKUP save operations.
• Convert ODS-5 file names to ODS-2 file names.

For specific information about performing these tasks, refer to the HP OpenVMS System Manager's Manual.

Using BACKUP also eliminates disk fragmentation. Fragmentation can occur as you create and extend files on a disk. If the file system cannot store files in contiguous blocks, it stores them in noncontiguous pieces. Eventually, the disk can become severely fragmented and system performance suffers. To eliminate fragmentation, perform an image backup of the disk and restore the backup copy. When you restore the image backup, BACKUP places the files on the disk contiguously.

Besides backing up your own files, directories, and disks, remember to back up your OpenVMS system disk. Depending on the policy at your site, individuals may be responsible for backing up their system disks, or an operator or system manager may perform the backup (as would likely be the case in a large, clustered computer system).

The two ways to back up your system disk are:

• If you have access to the OpenVMS Alpha, I64, or VAX system CD-ROM, you can use a menu system supplied on the CD-ROM to back up your system disk.
• If you do not have access to the OpenVMS VAX system CD-ROM, you must use standalone BACKUP to back up your system disk (VAX only).

Refer to the HP OpenVMS System Manager's Manual for more information about standalone BACKUP and the menu-driven procedure.

Types of backup operations are:

• An image backup (also called a full backup) saves a copy of all the files on a disk (or volume) to a save set. The first backup that you do on a disk must be an image backup; you cannot perform an incremental backup first.
• An image restore initializes the output disk and restores an entire volume.
• An image copy operation initializes the output disk and copies an entire volume; the image backup is a logical duplicate of the contents of the disk.
• An image compare operation compares the contents of entire volumes.

  Note Because an image copy or backup operation processes all files on the input volume, you cannot specify file-selection qualifiers for these operations. You can, however, restore files and directories selectively from an image save set.

  
  If the output volume of an image operation is a disk, BACKUP stores all files on the output volume contiguously, eliminating disk fragmentation and creating contiguous free blocks of disk space.
• An incremental backup saves only those files that have been created or modified since the most recent backup that was performed using the /RECORD qualifier. (The /RECORD qualifier records the date and time that the files are backed up.)
• An incremental restore operation restores an incremental save set. Specify the command qualifier /INCREMENTAL in an incremental restore operation.
• A file operation processes individual files or directories.
• A selective operation process files or volumes selectively, according to criteria such as version number, file type, UIC, date and time of creation, expiration date, or modification date.
  Perform selective save operations by using wildcard characters and input file-selection qualifiers (for example, /BACKUP, /BEFORE, /BY_OWNER (use instead of /OWNER_UIC), /CREATED, /EXCLUDE, /EXPIRED, /MODIFIED, and /SINCE).
• A physical operation copies, saves, restores, or compares an entire volume in terms of logical blocks, ignoring any file structure.

BACKUP allocates virtual memory to hold copies of the index file and storage bitmaps. With larger bitmaps, the virtual memory requirement of this utility increases correspondingly. To use BACKUP on volumes with large bitmaps, you might need to increase your page file quota. On OpenVMS VAX systems, you might also need to increase the system parameter VIRTUALPAGECNT.

Sizes of virtual memory requirements for the bitmaps are VAX pages (or Alpha and I64 512-byte pagelets) per block of bitmap. For the BACKUP utility, the virtual memory requirement for the bitmaps is equal to the sum of the sizes of all index file bitmaps on the volume set. (Note that this memory requirement is in addition to the BACKUP utility's substantial buffer pool.)

The following sections describe the BACKUP command line format.

7.2 BACKUP Command Line Format

To perform BACKUP operations, enter the DCL command BACKUP in the following format:

BACKUP evaluates the input and output specifiers to determine which type of operation to perform. BACKUP also uses the input specifier to locate the input and directs output to the output specifier.

7.3 BACKUP Input and Output Specifiers

BACKUP can process several different types of input and output. Depending on the type of operation being executed, input and output specifiers can be standard OpenVMS file specifications, BACKUP save-set specifications, or device specifications. Device specifications can refer to disk or magnetic tape volumes.

You can specify any valid OpenVMS file specification as BACKUP input or output specifiers; however, BACKUP does not allow node names in BACKUP file specifications. You can use wildcard characters, and you can list multiple file specifications as input to a single BACKUP operation.

A BACKUP save-set specification is the file specification of a BACKUP save set. When you use BACKUP to save files or volumes, BACKUP writes your files to a save set. You can specify the save set as input to other BACKUP operations. When specifying a save set, follow the rules for specifying a OpenVMS file. The OpenVMS User's Manual describes valid specifications for disk files; the HP OpenVMS System Manager's Manual explains the rules for specifying magnetic tape files. A save-set specification has no default file type, although you can use BCK or SAV.

The save-set name can be any valid OpenVMS file name and type. However, when you create a save set on magnetic tape, the save-set name has the following restrictions:

• The entire save-set name cannot exceed 17 characters, including the period delimiter.
• You cannot specify a version number.
• You cannot specify a directory name.

Device specifications used as BACKUP input or output specifiers follow the conventions for specifying devices outlined in the OpenVMS User's Manual.

By default, BACKUP treats an input or output specifier referring to a Files--11 disk as a file specification. Therefore, to identify a save set on a Files--11 volume, you must include the /SAVE_SET qualifier with the specifier (see /SAVE_SET). BACKUP treats input and output specifiers referring to magnetic tape as save sets.

Table 7-1 shows input and output specifiers for each type of BACKUP operation.

An element list is a list of arguments specified with a command or qualifier. The arguments, or elements, in the list are separated by commas. Element lists relating to input or output specifiers are allowed only in the following circumstances:

• If an input specifier refers to a Files--11 disk, you can construct lists from standard OpenVMS file specifications, as follows:

  $ BACKUP _From: DUA0:[DATA]A.DAT,B.DAT,[PROGRAMS]TEST.EXE _To: MSA0:TEST.SAV/LABEL=DLY101

• If an input specifier or an output specifier refers to a BACKUP save set on magnetic tape or sequential disk, you can specify more than one device name to be used in the operation. This allows you to process multivolume save sets efficiently by specifying the order in which devices will be used. The first volume is processed until it is full. The second (or subsequent) volume is processed while the media in the first (or previous) volume is being changed. However, the save-set name must appear with the first element in the list and must not appear in subsequent elements in the list.
  In the following example, BACKUP first saves data to a tape in drive MSA0, then to a tape in drive MSA1. When the tape in drive MSA1 is full, BACKUP saves data to a fresh tape in MSA0.

  $ BACKUP _From: DUA0:[DATA]*.*,DUA0:[PROGRAMS]*.* _To: MSA0:TEST.SAV,MSA1:/LABEL=WKLY01

• If you are performing an image operation on a volume set, you can specify element lists in the input and output specifiers. In the following example, BACKUP first restores the save set TEST.SAV from the tape in drive MSA0, and then continues to restore the save set from the tape in drive MSA1. BACKUP first restores this save set to DUA0. When DUA0 is full, BACKUP continues the restore operation to DUA1.

  $ BACKUP/IMAGE _From: MSA0:TEST.SAV,MSA1: _To: DUA0:[DATA...],DUA1:

You can also affect BACKUP operations by specifiying qualifiers. BACKUP has five types of qualifiers:

• Command qualifiers modify the default action of a BACKUP command. You can place command qualifiers anywhere in the command line. Command qualifiers act upon every file in the input or output specifier.
• Input file-selection qualifiers select files from the input specifier. Place them immediately after the input specifier.
• Input save-set qualifiers affect the way BACKUP handles an input save set during a restore or compare operation. Place them immediately after the input specifier.
• Output file qualifiers change the way output files are restored. Place them immediately after the output specifier.
• Output save-set qualifiers affect the way BACKUP processes an output save set during a save operation. Place them immediately after the output specifier.

It is important to understand the differences between the types of qualifiers. The position of qualifiers in the BACKUP command line affects the results of the command. Although command qualifiers can be placed anywhere in the command line, input- and output-specifier qualifiers are position-dependent. That is, input-specifier qualifiers must be placed immediately after the input specifier, and output-specifier qualifiers must be placed immediately after the output specifier.

Additionally, several BACKUP qualifiers are both input-specifier qualifiers and output-specifier qualfiers. To achieve the results you want from a BACKUP command, ensure that you place position-dependent qualifiers correctly. For example, use the /SAVE_SET qualifier as an output save-set qualifier in a BACKUP save operation and as an input save-set qualifier in a BACKUP restore operation.

Appendix G contains more information about valid combinations of BACKUP qualifiers.