Encrypted Volume and File System v2.2 Administrator Guide (777846-001, April 2014)

8 Backing up and restoring data on EVS volumes
This chapter contains procedures for backing up and restoring data on EVS volumes and addresses
the following topics:
• “Backing up EVS volumes” (page 78)
• “Backups using LVM mirrored volumes” (page 80)
• “Backups using VxVM mirrored volumes” (page 87)
• “Backups using nonmirrored volumes” (page 94)
• “Restoring backup media” (page 97)
Backing up EVS volumes
This section contains procedures for backing up data on EVS volumes. The backup procedures
differ depending on the following factors:
• Use of mirrored volumes or nonmirrored volumes. The mirrored volumes can be LVM or VxVM.
NOTE: You cannot perform online encrypted backups to a tape or other non-EVFS device
unless you use mirrored volumes. If you do not have mirrored volumes, you can still perform
online encrypted backups, but you must use a second EVS volume as the target device.
• The format of the backup media (encrypted or cleartext).
• The type of target backup device (non-EVFS device, such as a tape, or a second EVS volume).
• The backup utility type (block device utility, such as dd, or file utility, such as tar or cp).
When using a block device utility, verify that the size of the EVS volume is appropriate for the
backup media you are using and for the time it will take to back up a whole volume.
Table 2 lists backup types for installations using LVM or VxVM mirrored volumes. Table 3 lists
backup types for installations not using mirrored volumes.
NOTE: The backup procedures in this section use the dd and cp utilities for basic operation and
clarity in the examples. Other procedures can be found in the Backing Up and Restoring Data on
HP-UX EVFS Volumes Using HP OpenView Storage Data Protector 6.0 white paper. For the latest
white papers and announcements about EVFS deployment tips and best practices, see the EVFS
product documentation set at http://www.hp.com/go/hpux-security-docs.
Table 2 Backup types with LVM or VxVM mirrored volumes
Notes
Source EVFS
volume stateSupported?
Backup utility
typeTarget deviceMedia format
One volume in the mirror will be
off line (unavailable to users). The
RawYesBlock device
utility, such as
dd
Tape or other
non-EVFS
device
Encrypted
remaining volume in the mirror is
still available for user access.
See “Creating encrypted backup
media on a Non-EVFS device (LVM
mirrored volumes) ” (page 81) or
“Creating encrypted backup media
on a non-EVFS device (VxVM
mirrored volumes)” (page 87).
––NoFile utilityTape or other
non-EVFS
device
Encrypted
78 Backing up and restoring data on EVS volumes