you should have just done an update:
http://seer.entsupport.symantec.com/docs/323470.htm
What does it mean when the "Failed Items" column displays "Not Set" on the "Index Volumes" tab of the "Archive Properties"?
Details:
This value is a representation from the SQL Table for the Index Volume, which is gathered from the IndexMissing.log file contained in the physical location of the Index Volume.
When this value displays 'Not Set" it means that the Index has not been updated since an Upgrade from Enterprise Vault 7.0 and the value within SQL is set to 'NULL'. This does not affect the validity of Discovery Accelerator searches.
To properly Update this value perform an 'Index Volume Update' on any of the affected Index Volumes.
You should get updates in the EV app log
http://seer.entsupport.symantec.com/docs/304099.htm
ndex rebuild status is now logged with an Informational Event ID 7305 in Enterprise Vault (EV) 2007.
Details:
This informational event was added in EV 2007 to show the status of the index rebuild process. It will be logged in the Enterprise Vault Event Viewer log. This event will include: index volume identifier, index volume path, job id, job author, job description (update/rebuild/repair), job elapsed time, processing time, number of items added, additions abandoned, items deleted, percentage completed and an estimated remaining time.
Event Type: Information
Event Source: Enterprise Vault
Event Category: Index Server
Event ID: 7305
Date: 04/04/2008
Time: 02:59:00
User: N/A
Computer: EVSERVER
Description:
Index volume update in progress
Index Volume: 10E77052C925CA94F8638797AC8D530231110000vault/Volume:123 (Active Archive)
Percentage completed: 95%
Estimated time of completion: 04/04/2008 03:52
Index Volume Path: E:\Indexes\10E77052C925CA94F8638797AC8D530231110000vault
Job Id: Vol_123
Job Author: Domain\evadmin
Job Description: Rebuild index volume
Job elapsed time: 1:25:11 (hours:minutes:seconds)
Processing time: 1:25:11 (hours:minutes:seconds)
Number of items added: 100000
Number of items additions abandoned: 0
Number of items deleted: 0