mkdvd Command

Purpose

Creates multi-volume DVDs from a mksysb, savevg, or savewpar backup image.

Syntax

mkdvd -r directory | -d dvddevice | -S [ -m mksysbimage | -M mksysbtarget | -s savevgimage | -v savevgvolumegroup | -w savewpar_image | -W wparname ] [ -C cdfsdir ] [ -I cdimagedir ] [ -V dvdfsvolumegroup ] [ -B ] [ -p pkgsourcedir ] [ -R | -S ] [ -i image.data ] [ -u bosinst.data ] [ -f wparspecificationfile ] [ -e ] [ -P ] [ -l packagelist ] [ -b bundlefile ] [ -z customfile ] [ -D ] [ -U ] [ -Y ] [ -n ] [ -a ] [ -A ] [ -c ] [-Z] [ -G | -N ] [-x file ]

Description

The mkdvd command creates a system backup image (mksysb) to DVD-Recordable (DVD-R, DVD-RAM) from the system rootvg or from a previously created mksysb image. It creates a volume group backup image (savevg) to DVD from a user-specified volume group or from a previously created savevg image. It also creates the backup image of a workload partition (savewpar) to DVD from a user-specified workload partition or from a previously created savewpar image.

Note: If the system has a multibos environment where both instances are mounted, you can restore the backup only by using the alt_disk_mksysb command.

For DVD media, system backups made with the mkdvd command have a limitation in that they expect the media to be 4.7 GB or larger per side. The mkdvd command does not process the next volume until it writes over 4 GB on the current volume, thus the use of smaller media would result in corruption when going beyond the media capacity.

When a bootable backup of a root volume group is created, the boot image reflects the currently running kernel. If the current kernel is the 64-bit kernel, the backup boot image is also 64 bit, and it only boots 64-bit systems. If the current kernel is a 32-bit kernel, the backup boot image is 32 bit, and it can boot both 32-bit and 64-bit systems.

With the mkdvd command, you can create bootable and non-bootable DVDs in Rock Ridge (ISO9660) or UDF (Universal Disk Format) format.

Note: The functionality required to create Rock Ridge format DVD images and to write the DVD image to the DVD-RAM device is not part of the mkdvd command. You must supply additional code to the mkdvd command to do these tasks. You can call the code using shell scripts and then link it to /usr/sbin/mkrr_fs (for creating the Rock Ridge format image) and /usr/sbin/burn_cd (for writing to the DVD device). Both links are called from the mkdvd command.

Some sample shell scripts are included for different vendor-specific routines. You can find these scripts in /usr/samples/oem_cdwriters.

If you do not supply any file systems or directories as command parameters, the mkdvd command creates the necessary file systems and removes them when the command finishes executing. File systems you supply are checked for adequate space and write access.

Note: If the mkdvd command creates file systems in the backup volume group, they are excluded from the backup.

If you need to create multi-volume DVDs because the volume group image does not fit on one DVD, the mkdvd command provides instructions for DVD replacement and removal until all the volumes have been created.

Flags

Item	Description
-a	Does not back up extended attributes or NFS4 ACLs.
-A	Backs up DMAPI file system files.
-b bundlefile	Gives the full path name of the file containing a list of filesets to be installed after the mksysb is restored. This file is copied to ./usr/sys/inst.data/user_bundles/bundle_file in the DVD file system and also copied to RAM in case the DVD is unmounted. The file would be listed as BUNDLES=/../usr/sys/inst.data/user_bundles/bundlefile in the bosinst.data file.
-B	Prevents mkdvd from adding boot images (non-bootable DVD) to the DVD. Use this flag if creating a mksysb DVD that you will not boot. Before installing the non-bootable mksysb DVD, you must boot a same level (V.R.M.) product media. The mkdvd command defaults to creating a bootable DVD for the machine type of the source system. See the Notes below.
-c	Does not compress or pack files as they are backed up.
-C cdfsdir	Specifies the file system used to create the DVD file system structure, which must have up to 4.38 GB for DVD sized images. The DVD image only consumes as much room as necessary to contain all the data on the DVD. If you do not specify the -C flag and the /mkcd/cd_fs directory exists, the mkdvd command uses that directory. If you do not specify the -C flag and the /mkcd/cd_fs directory does not exist, the mkdvd command creates the file system /mkcd/cd_fs and removes it when the command finishes executing. The command creates the file system in the volume group indicated with the -V flag, or rootvg if that flag is not used. Each time you invoke the mkdvd command, a unique subdirectory (using the process id) is created under the /mkcd/cd_fs directory, or in the directory specified with the -C flag. Note: If performing DVD sized backups, the file systems need to be large file enabled. This also requires setting the file ulimit size to unlimited.
-d dvddevice	Indicates the DVD-R or DVD-RAM device (`/dev/cd1`, for instance). This flag is required unless you use the -S flag.
-D	Turns on the debug output information feature. The default is no debug output.
-e	Excludes the files and directories from the backup image listed in the /etc/exclude.volume_group file. You cannot use this flag with the -m or -s flags.
-f wparspecificationfile	Specifies the user-supplied WPAR specification file. This specification file of workload partition takes precedence over the wpar.spec file in the savewpar image. If you do not use the -f flag, the mkdvd command restores the wpar.spec from the given savewpar image, or generates a new wpar.spec file during the creation of savewpar.
-i image.data	Specifies the user-supplied image.data file. This data file takes precedence over the image.data file in the mksysb image. If you do not specify the -i flag, then the mkdvd command restores the image.data from the given mksysb image, or generates a new image.data file during the creation of mksysb. Note: The -i flag cannot be used to specify a user-supplied vgname.data file for use with a savevg image.
-I cdimagesdir	Specifies the directory or file system where the final DVD images are stored before writing to the DVD-R or DVD-RAM device. If this flag is not used, the mkdvd command uses the */mkcd/cd_images* directory if it already exists. If not, the command creates the /mkcd/cd_images file system in the volume group given with the -V flag, or in rootvg if that flag is not used. If the mkdvd** command creates the file system, it is removed upon command completion, unless either the -R or -S flag is used. If the -R or -S flag is used, consideration must be made for adequate file system, directory, or disk space, especially when creating multi-volume DVDs. The DVD image only s as much room as necessary to contain all the data on the DVD. Note: If performing DVD sized backups, the file systems need to be large file enabled. This also requires setting the file ulimit size to unlimited.
-l packagelist	Specifies the file containing a list of additional packages you want copied to the ./usr/lpp/inst.images directory of the DVD file system. The images are copied from the location named with the -p flag. If you use the -l flag you must also use the -p flag.
-m mksysbimage	Specifies a previously created mksysb image. If you do not specify the -m flag, the mkdvd command calls mksysb. (See the -M flag for more information about where the mksysb image is placed.)
-M mksysbtarget	States the directory or file system where the mksysb or savevg image is stored if a previously created backup is not given with the -m or -s flags. If the -M flag is not used and a mksysb or savevg image is not provided, the mkdvd comand verifies that /mkcd/mksysbimage exists. If the directory does not exist, then the mkdvd command creates a separate file system, /mkcd/mksysbimage, where the mksysb or savevg images are temporarily stored. The command creates the file system in the volume group given with the -V flag, or in rootvg if that flag is not used. Note: If performing DVD sized backups, the file systems need to be large file enabled. This also requires setting the file ulimit size to unlimited.
-n	Backs up user volume group information and administration data files. This backs up files such as /tmp/vgdata/vgname/vgname.data and map files, if any exist. This does not back up user data files. This backup can be used to create a user volume group without restoring user data files. This cannot be done to rootvg.
-N	Includes file systems that belong to a workload partition (WPAR) in the defined state in the system backup. Note: To be included in the backup, all file systems that belong to a WPAR in the defined state need to be in the rootvg volume group.
-p pkgsourcedir	Names the directory or device that contains device and kernel package images. The device can only be a CD or DVD device (for example, /dev/cd0). If you use the same DVD-R or DVD-RAM device that you gave with the -d flag, the product media must be inserted into the drive first. The mkdvd command then prompts you to insert the writable DVD before the actual DVD creation.
-P	Creates physical partition mapping during the mksysb or savevg creation. You cannot use this flag with the -m or -s flags.
-r directory	Indicates existing directory structure to burn onto a DVD. This makes a DVD image that is a copy of the given directory structure.
-R	Prevents the mkdvd command from removing the final DVD images. The mkdvd command defaults by removing everything that it creates when it finishes executing. The -R flag allows multiple DVD image sets to be stored, or for DVD creation (burn) to occur on another system. If multiple volumes are needed, the final images are uniquely named using the process ID and volume suffixes.
-s savevgimage	Indicates a previously created savevg image. See Notes for details.
-S	Stops the mkdvd command before writing to the DVD-R or DVD-RAM without removing the final DVD images. The -S flag allows multiple DVD sets to be created, or for DVDs to be created on another system. The images remain in the directory marked by the -I flag, or in the */mkcd/cd_images*** directory if the -I flag is not used. If multiple volumes are required, the final images are uniquely named using the process ID and volume suffixes.
-u bosinst.data	Specifies the user-supplied bosinst.data file. This data file takes precedence over the bosinst.data file in the mksysb image. If you do not specify the -u flag, then the mkdvd command restores bosinst.data from the given mksysb image, or generates a new bosinst.data file during the creation of mksysb.
-U	Creates a UDF (Universal Disk Format) file system on DVD-RAM media. It does not require the amount of free space needed to create Rock Ridge format backups. It does not need the /mkcd/cd_fs and /mkcd/cd_images file systems. Therefore, the only temporary disk space it needs is to create the backup image that will be copied to the media. This means that the -I and -C flags do not apply to the -U flag. Because the backup is copied to the media, images cannot be created and burned later or on another system. So, the -R flag and -S flag do not apply when using the -U flag. You need to specify a device to write to with the -d flag. The -U flag does not use the /usr/sbin/mkrr_fs or /usr/sbin/burn_cd file systems.
-v savevgvolumegroup	Denotes the volume group to be backed up using the savevg command. See Notes for detials. (See the -M flag for more information about where the savevg image is placed.)
-V dvdfsvolumegroup	Indicates the volume group used when creating the file systems needed for the mkdvd command. If the -V flag is not given and a file system is needed but not there (because it was not supplied with other flags), then rootvg is the default volume group for creating the file systems. If the mkdvd command creates the file systems in the backup volume group, those file systems are not included as part of the backup image. The mkdvd-created file systems are removed upon the command's completion.
-w savewparimage	Indicates a previously created savewpar image.
-W wparname	Denotes the workload partition to be backed up using the savewpar command.
-Y	Accepts licenses.
-z customsfile	States the full path name of the file to be copied to the root directory of the DVD file system. This file could be a customization script specified in the bosinst.data file, such as `CUSTOMIZATION_FILE=filename`. For example: If the file `my_script` is in /tmp on the machine where mkdvd is running, then enter `-z/tmp/my_script` and specify `CUSTOMIZATION_FILE=my_script`. The code copies the script to the root directory of the RAM file system before it executes.
-Z	Specifies that the Encrypted file system (EFS) information for all the files, directories, and file systems is not backed up.
-G	Excludes WPAR file systems from the system backup. This flag is not valid with -N flag.
-x file	Excludes the file systems that are listed in the file from the system backup. File system mount points must be listed one per line.

Note: Use care when excluding file systems as a resulting backup can be unusable for system restoration.

Note:

If you are creating a non-bootable DVD (using the -B flag), you cannot use the -p or -l flags.
If you are creating a non-bootable DVD with a savevg image (using the -s or -v flags), you cannot use the -p, -l, -u, -i, -z, or -b flags.

Examples

To generate a bootable system backup to the DVD-R device named /dev/cd1, enter:
```
mkdvd -d /dev/cd1
```
To generate a system backup to the DVD-R or DVD-RAM device named /dev/cd1, enter:
```
mkdvd -d /dev/cd1
```
To generate a non-bootable volume group backup of the volume group myvg to /dev/cd1, enter:
```
mkdvd -d /dev/cd1 -v myvg
```
Note: All savevg backup images are non-bootable.
To generate a non-bootable backup of the workload partition mywpar to /dev/cd1, enter:
```
mkdvd -d /dev/cd1 -W mywpar
```
Note: All savewpar backup images are not bootable.
To generate a non-bootable backup of the workload partition mywpar to /dev/cd1 from the previously generated savewpar image /wparbackups/mywpar.bff, enter:
```
mkdvd -d /dev/cd1 -w /wparbackups/mywpar.bff
```
To create a DVD or DVD that duplicates an existing directory structure such as the following:
```
/mycd/a
/mycd/b/d
/mycd/c/f/g
```
enter:
```
mkdvd -r /mycd -d /dev/cd1
```
After mounting with mount -o ro /dev/cd1 /mnt, cd to /mnt; a find . -print command displays:
```
./a
./b
./b/d
./c
./c/f
./c/f/g
```

Files

Item	Description
/usr/bin/mkdvd	Contains the mkdvd command.