ACRONIS Backup & Recovery 10 Advanced Server, UR, AAS, RNW, L2, 500-1249u, FRE User's Guide download pdf (Page 352)

For example, let a Linux machine contain a hard disk which is split into three volumes, or partitions:

the first, second, and third partitions. These partitions are available in the tree as /dev/hda1,

/dev/hda2, and /dev/hda3, respectively. To perform a disk backup of the, say, third partition, one can

type /dev/hda3 in the row of the Volumes to back up selection rules dialog box.

Furthermore, a Linux partition can be mounted anywhere inside the tree. Say, /dev/hda3, can be

mounted as a “subdirectory” inside the tree, such as /home/usr/docs. In this case, one can type

either /dev/hda3 or /home/usr/docs in the Volume field to perform a disk backup of the third

partition.

In general, when setting up a centralized policy to perform volume backups of Linux machines, make

sure that the paths entered in the Volume field correspond to partitions (such as /dev/hda2 or

/home/usr/docs in the previous example), and not to directories.

Standard names for Linux partitions

Names such as /dev/hda1 reflect the standard way of naming IDE hard disk partitions in Linux. The

prefix hd signifies the disk type (IDE); a means that this is the first IDE hard disk on the system, and 1

denotes the first partition on the disk.

In general, the standard name for a Linux partition consists of three components:

 Disk type; hd for IDE drives, sd for SCSI drives, md for software RAID drives (for example, dynamic

volumes);

 Disk number; a for the first disk, b for the second disk, etc.;

 Partition number on the disk; 1 for the first partition, 2 for the second partition, etc.

To guarantee backing up selected disks regardless of their type, consider including three entries in

the Volumes to back up selection rules dialog box, one for each possible type. For example, to back

up the first hard disk of each Linux machine under a centralized policy, you may want to type the

following lines in the Volume field:

/dev/hda1

/dev/sda1

/dev/mda1

Names for logical volumes

To back up logical volumes, also known as LVM volumes, specify their full names in the selection

rules. The full name of a logical volume includes the volume group to which the volume belongs.

For example, to back up two logical volumes, lv_root and lv_bin, both of which belong to the volume

group vg_mymachine, specify the following selection rules:

/dev/vg_mymachine/lv_root

/dev/vg_mymachine/lv_bin

To see the list of logical volumes on a machine, run the lvdisplay utility. In our example, the output

would be similar to the following:

1 2 ... 347 348 349 350 351 352 353 354 355 356 357 ... 401 402

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ACRONIS Backup & Recovery 10 Advanced Server, UR, AAS, RNW, L2, 500-1249u, FRE User's Guide Page 352