Here is some basic exchange restore info. I would need to know more about your environment to help further. <br>
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Restoring Exchange Databases<br>
Typically, restoration fits one of two scenarios: restoring all databases if the whole disk partition is destroyed, or restoring one database due to some less-disastrous hardware corruption. <br>
If the PRIV.EDB file is the only one damaged on an Exchange server, for example, you can restore it in two basic steps:<br>
· Put everything on tape back on the disk.<br>
· Call Exchange to initiate recovery procedures.<br>
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This second step is triggered automatically by most backup and restore products. However, before you initiate the recovery it’s best to carefully check that everything is where you expect it on disk. Restoring the wrong data in a recovery can cause irksome problems, so a quick sanity check is worthwhile.<br>
Immediately after the restore portion of the recovery operation, these files should be on disk:<br>
· PRIV.EDB, restored from tape<br>
· PRIV.PAT, restored from tape<br>
· EDB.CHK, the checkpoint file, unaffected by the restore operation<br>
· EDBNNNNN.LOG files restored from tape<br>
· Sequence of log files right up to the current EDB.LOG, unaffected by the restore<br>
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When the store service starts it initializes the database software, which checks the status of the data on disk. The “restore in progress” flag tells the database software that the database has been restored from tape. <br>
The database software uses information recorded in the RestorInProgress key to determine the “minimum” range of log files that need to be replayed to make the restored database consistent. These log files, together with data in the .PAT files, is played into the database files first. If an unbroken sequence of log files exists on disk then replay will continue, potentially right up to the “current” log file EDB.LOG. If this process is successful then the database will have been returned to its state at the point of the outage. At this point a “normal” start-up of the store service will resume.<br>
Note This procedure varies depending on which parts of the Exchange server have been damaged and which files are restored. <br>