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14.2.3 Overview of How the Backup eMTool Does a Restore
Before restoring, you need to collect all your backup files by following the instructions in
Section
14.4, “Preparing for a Restore,” on page 393
. When you direct the Backup eMTool to begin the
restore through iManager or the eMBox Client, the process is done by the Backup eMTool as
follows:
1. The DS Agent is closed.
2. The active DIB (Data Information Base) set is switched from the DIB set named NDS to a new
DIB set named RST.
(The existing NDS database is left on the server; if the restore verification fails it will once
again become the active DIB set.)
3. The restore is performed, restoring to the DIB set named RST.
4. The DIB set is disabled.
The login disabled attribute is set on the pseudo server, preventing the DS Agent from being
able to open using this DIB set.
5. The roll-forward log settings are reset to the default.
This means that after a restore, roll-forward logging on the server is always set to off, and the
location of the roll-forward logs is reset to the default.
(If you want roll-forward logging turned on for this server, you must plan to re-create your
configuration for roll-forward logging after a restore, to make sure it is turned on and the logs
are being saved in a fault-tolerant location. After turning on the roll-forward logs, you must
also do a new full backup.)
6. Verification of the restored RST database is performed.
The server attempts to verify the consistency of the data that has been restored. It does this by
contacting every server that it shares a replica with and comparing the transitive vectors.
The output from this verification process is printed in the log file.
If the transitive vector on the remote server is ahead of the local vector, then data is missing
from the restore, and the verification fails.
Here is an example of the information that's recorded in the log file if verification fails for one
of the replicas, showing the transitive vectors that were compared:
Server: \T=LONE_RANGER\O=novell\CN=CHIP
Replica: \T=LONE_RANGER\O=novell
Status: ERROR = -6034
Local TV Remote TV
s3D35F377 r02 e002 s3D35F3C4 r02 e002
s3D35F370 r01 e001 s3D35F370 r01 e001
s3D35F363 r03 e001 s3D35F363 r03 e001
s3D35F31E r04 e004 s3D35F372 r04 e002
s3D35F2EE r05 e001 s3D35F2EE r05 e001
s3D35F365 r06 e003 s3D35F365 r06 e003
For more information, see
“Transitive Vectors and the Restore Verification Process” on
page 387
.
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