The backup image command creates an image backup of one or more volumes on your system.
You can use the backup image command to back up NTFS or ReFS, or unformatted RAW volumes. If a volume is NTFS-formatted, only those blocks that are used by the file system are backed up. On ReFS volumes, all blocks are backed up.
If you set the imagegapsize option to 0, all blocks, including unused blocks at the end of the volume, are backed up.
If you specify an AIX® JFS2 file system for image backup, only those blocks that are used by the file system are backed up. If you set the imagegapsize option to zero, all blocks, including blocks at the end of the volume, are backed up.
The client backs up the files that have modification dates and times (on the client) that are later than the date and time of the last incremental backup of the file system on which the file is stored (on the server).
If the server time is ahead of the client time, incremental-by-date backups, or image backup with mode=incremental, skip the files, which had been created or modified after the last incremental or image backup with a modification date earlier than the last incremental backup time stamp.
If the client time is ahead of the server time, all files that had been created or modified before the last incremental or image backup and have a modification time stamp later than the last incremental backup time stamp, are backed up again. Typically, these files would not get backed up because they had already been backed up.
The backup date can be checked by the query filespace command.
The Tivoli Storage Manager client must support the raw device type on the specific platform to perform an image backup of a raw device. You can perform an image backup only on local devices. Clustered devices or file systems as well as devices or file systems that are shared between two or more systems are not supported. If you want to perform an image backup for a file system that is mounted on a raw device, the raw device must be supported.
Use the include.image option to include a file system or logical volume for image backup, or to specify volume-specific options for image backup.
The backup image command uses the compression option.
This command is valid for AIX, HP-UX, all Linux clients, and Solaris.
This command is valid for all Windows platforms.
.-----------------. V | >>-Backup Image--+------------+----+-------------+-+----------->< '- --options-' '- --filespec-'
Specify the file space over which the logical volume is mounted or the logical volume name. If there is a file system that is configured in the system for a given volume, you cannot back up the volume with the device name.
ANS1063E Invalid path specified
Image backup is only supported on a volume that has a mount or a drive letter assigned to it. A volume without a drive letter or mount point cannot be backed up.
Option | Where to use |
---|---|
asnodename | Client options file (dsm.opt) or command line. |
asnodename | Client system options file (dsm.sys) or command line. |
compressalways | Client system options file (dsm.sys) or command line. |
compressalways | Client options file (dsm.opt) or command line. |
compression | Client options file or command line. |
dynamicimage | Use with the backup image command or the include.image option in the options file. |
imagegapsize | Use with the backup image command, the include.image option, or in the options file. |
mode | Command line only. |
postsnapshotcmd | Use with the backup image command, the include.image option, or in the options file. |
presnapshotcmd | Use with the backup image command, the include.image option, or in the options file. |
snapshotcachesize | Use with the backup image command, the include.image option, or in the options file. |
snapshotproviderimage | Client options file or with include.image option. |
dsmc backup image /home/test -mode=incremental
dsmc backup image m:\mnt\myntfs
dsmc backup image h: -mode=incremental
dsmc backup image /home -snapshotproviderimage=none
dsmc backup image f: -snapshotproviderimage=none
Command: dsmc backup image /home -dynamicimage=yes
AIX client: dsmc backup image /home
-snapshotproviderimage=JFS2
LINUX client: dsmc backup image /home
-snapshotproviderimage=LINUX_LVM
dsmc backup image f: -snapshotproviderimage=VSS
dsmc backup image /dev/lv01
dsmc backup image f: