Critical Data Recovery

The following example assumes the disk containing the operating system and Backup software is still operational, but another disk containing critical data has been lost. The example applies to both Backup servers and clients. If the disk is damaged beyond repair, replace it with a new disk the same size or larger than the original disk. You need a disk large enough to hold all the data you plan to recover.

How to Recover Critical Data

To recover the critical data, follow these steps:
1.Install the replacement disk.
Make sure the operating system and kernel recognize the new disk. 2.Use the saved disk partition information to re-create the disk partitions with the
same structure as the original disk.
See "Disk Information" on page 6.
If you did not save the disk information, it should still be available because it is
located on the primary disk, which in this case, is operational. To find the original
disk partition information, examine /etc/vfstabfor a Solaris system and
/etc/fstabfor a SunOS system. However, you must guess how big each partition
should be.
3.Use the output from the disk information command to make a filesystem for each
raw partition you plan to recover, then mount the block partition. (Backup does
not initialize or create filesystems; it recovers data into existing filesystems.) 4.Use the appropriate command to format the replacement disk.
For SunOS and Solaris systems, use newfsor mkfs.

Caution - Make sure the disk is no longer needed, because you will completely
destroy the disk contents when you use newfs, or mkfs.

Chapter 2

Disaster Recovery

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