Error message "First Storage Group is not a valid drive" when perfroming backup.

Author:

Kirill Palagin MVP

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SUMMARY

Backup of Exchange data may fail under certain circumstances and you may see the following error message in your backup log "Microsoft Information Store\First Storage Group is not a valid drive"

SYMPTOMS

Backup of Exchange databases may fail and you may see the following message in backup log "Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access".

CAUSE

The exact failure cause will be logged in event in Application Event log at the time backup is stopped.
Two known causes are
1. problem with backup target media, not formatted or not having enought free space.
2. trying to perform incremental backup before perfroming at least one full backup.

RESOLUTION

Exact resolution steps depend on the nature of underlaying problem. For specified causes:
1. make sure backup media is formatted. If backup target is disk then make sure it has enough free space to accomodate all data.
2. perform full backup before trying to do incremental.
Properties

Article ID: 555613 - Last Review: 14 Feb 2017 - Revision: 1

Microsoft Exchange Server 2003 Standard Edition, Microsoft Exchange 2000 Server Standard Edition, Microsoft Exchange 2000 Enterprise Server, Microsoft Exchange Server 2003 Enterprise Edition

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