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We are running Exchange 2003 on Server 2003. &nbsp;In performing a backup (using ntbackup, as well as Veritas Backup Exec V10.D) , the operation fails roughly at the same place byte-wise. &nbsp;The event log error, and ntbackup logfile shows:<br />
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Error: The device reported an error on a request to write data to media.<br />
Error reported: Unknown error.<br />
There may be a hardware or media problem.<br />
Please check the system event log for relevant failures.<br />
The operation was ended.<br />
Backup completed on 3/29/2007 at 10:01 AM.<br />
Directories: 0<br />
Files: 1<br />
Bytes: 502,200,092<br />
Time: &nbsp;6 minutes and &nbsp;21 seconds<br />
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Error: xxxxMAIL\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access.
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We are running Exchange 2003 on Server 2003.  In performing a backup (using ntbackup, as well as Veritas Backup Exec V10.D) , the operation fails roughly at the same place byte-wise.  The event log error, and ntbackup logfile shows:

Error: The device reported an error on a request to write data to media.
Error reported: Unknown error.
There may be a hardware or media problem.
Please check the system event log for relevant failures.
The operation was ended.
Backup completed on 3/29/2007 at 10:01 AM.
Directories: 0
Files: 1
Bytes: 502,200,092
Time:  6 minutes and  21 seconds

Error: xxxxMAIL\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access.

Problem backing up Exchange datastore

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.