Schedules; Restore Persistent Images; Disaster Recovery - IBM TotalStorage 201 User Reference Manual

Network attached storage 200
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Schedules

Use this panel to schedule persistent images to be taken at specific times (this is
independent of the scheduled backup function via NAS Backup Assistant described
earlier). Each PSM schedule entry defines a set of persistent images to be taken
starting at a specified time and at a specified interval, with each image having the
set of properties defined in the entry. This allows you to customize scheduled
persistent images on a per-volume basis.
For instance, you could set a persistent image for one volume to occur every hour,
and for another volume to occur only once a day. The set of properties you can
define are the same properties described in the Persistent Images panel description
above; when you define these properties, all persistent images created according to
this schedule entry will be given those properties. Once a scheduled persistent
image is created, certain properties of that persistent image can be modified via the
Persistent Images panel, independently of other persistent images created
according to the schedule.
Once a schedule entry is created, it appears in the list of scheduled persistent
images. Subsequently you can modify the properties of an existing entry, such as
start time, repetition rate, the volume(s), and so on. For a schedule you can name
the persistent images based on a pattern you configure; format specifiers (defined
on the New Persistent Image Schedule panel under the Persistent image name(s)
entry field) allow you to customize variable portions of the name.

Restore Persistent Images

On this panel, you can select an existing persistent image and quickly restore the
volume contained in the image back to the state it was in at the time the selected
persistent image was taken. This is useful if you need to recover an entire volume,
as opposed to just a few files. This volume restore function is available for the data
volumes, but not the system volume.

Disaster Recovery

PSM provides a disaster recovery solution for the system drive. This extends the
volume restore function of PSM to provide disaster recovery in the event that the
system drive is corrupted to the point where the file system is corrupt, or the
operating system is unbootable. Note that while disaster recovery is also supported
via the Recovery CD-ROM and backup and restore capability, that is a two-step
process. In contrast, the method supported by PSM allows you to restore the
system drive from a single image, without having to go through the entire recovery
procedure and then additionally having to restore a system drive backup.
Use the Disaster Recovery panel to schedule and create backup images of the
system drive, and to create a bootable diskette which will allow you to restore the
system drive from a backup image (located on the maintenance partition, or
network drive). The remainder of this section provides additional information on how
to perform backup and recovery operations for the NAS 200.
Note: Restoration of a PSM backup image over the network is not supported for
the Gigabit Ethernet Adapter. If you have only Gigabit Ethernet adapters
installed, it is recommended that you perform PSM backup of each NAS 200
to its maintenance partition (D: drive), which would allow you to recover if the
system volume is corrupt and/or unbootable. Should the hard disk drive fail
completely, you would need to use the Recovery CD as described in "Using
Chapter 6. Additional administrative functions
39

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