how make a disaster recovery of exchange server 5.5

Prepare the Recovery Server

Prepare a non-production recovery server (some systems keep a recovery server running and available at all times). You can install this computer as a Windows NT PDC, BDC, or member server, and it should have the appropriate Windows NT service pack installed. Make sure it has enough disk space for restoring the entire information store from the backup tape, that it is equipped with a tape drive compatible with the drives on the production servers, and that the tape drive is tested and working.

Create a new site (do not join site). The next step requires installing Exchange. When you do this, do not join the site. The recovery server should be a stand-alone computer that is not joined to your production site.

Log on to Windows NT as administrator and perform a complete Exchange install using the same site and organization name used on the server from which you are restoring the mailbox. Do not join site. The server name of the restore computer does not matter for a single mailbox restore because you are restoring only the information store, not the directory. If you have a dedicated recovery server per location, you can keep Exchange installed, but if several sites share a recovery server, keep a copy of the Exchange installation code on the hard disk so you can install based on the required site and organization. The paths for this Exchange install do not have to match the paths of the production Exchange install being recovered.

Install the Exchange service pack that was on the production computer when the information store was last backed up. If the production server had Service Pack 1 on it when the backup was made and you have since installed Service Pack 2, install Service Pack 1 on the recovery server before restoring the information store.

Install the Exchange client on the recovery server.

Restore the Information Store from Tape

This procedure uses a tape from a Normal online backup for the restore.
(You can use an offline tape, but this requires some extra steps. They are explained after this procedure.)

Insert the backup tape in the drive.
Log on to the recovery domain as administrator.
From the Administrative Tools group run Backup.
From the pull-down menu, click Operations, Microsoft Exchange.

Click the Tapes icon and double-click on the tape name. A catalog status box will be displayed stating "Loadingà."
Click "ORG\SITE\SERVER"\information store in the right side of the Tapes window.

Click the Restore button from the upper part of the Backup main screen.

On the Restore Information screen, enter the name of the destination server in destination server field (HOTSPARE).
Select Erase All Existing Data, Private, Public, Verify After Restore, and Start Service After Restore. Click the OK button.

Click OK on the restore message ("You are about to restore Microsoft Exchange components. The Microsoft Exchange services on the destination server will be stopped.")
Click OK on the Verify Status screen.

Click Control Panel and then Services and verify that the Exchange services are running.

Offline Backup Available
If you have an offline backup of the Exchange information store, follow these steps:

Stop all Exchange information store services.
Determine the location of the database and logs for the information store service from the following registry locations:

Information store service log path:
HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \MSExchangeIS \ParametersSystem \DB Log Path

Private information store database path:
HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \MSExchangeIS \ParametersPrivate \DB Path

Public information store database path:
HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \MSExchangeIS \ParametersPublic \DB Path

Move out all files from the EXCHSRVR\MDBDATA directories on all drives.

Copy the PRIV.EDB file to the private information store database path.

Copy the PUB.EDB file to the public information store database path.

Copy any information store log files to the information store service log path.

Make sure that the Exchange directory service is started.
From the command prompt, change to the EXCHSRVR\BIN directory and execute the following command:

isinteg ûpatch

Start the information store service.