RE: NT Backup Fails - inconsistency error.

Hi Shaun,

Thanks for your new information.

From you description, I know you find the Event 8009 in Event viewer, and
when you backup Mailbox store you still find the Error: "An inconsistency
was encountered in the requested backup file." in backup log.

Based on my knowledge, you can verify that the backed up data matches the
original data after the backup completes. Backup creates a checksum for
every file as it is backed up, and stores those checksums in the actual
backup. At the end of a successful backup, every file in the backup is read
and compared to the checksums that are also stored in the backup to make
sure that the file in the backup matches the checksum created at the time
the file was backed up. This means that you are verifying the media instead
of verifying that the file in the backup still matches the original at the
end of the backup, a subtle distinction to understand.

But I recommend Do not use this option when you back up Exchange databases.
Although this option helps you verify data integrity in some types of data
backups (for example, System State backups and full computer backups), do
not use this option when you back up Exchange databases. Selecting this
option will substantially increase the time that the backup takes to
complete. The only added value that this option provides in this case is to
verify that the media can still be read immediately after it was written
to.

Additionally, although the backed up Exchange database files were compared
to the originals on disk after the backup, the verification would fail
because the online databases are constantly changing during a backup.

I hope the above information helps.

Have a good day.

Best Regards,

Steven Zhu
MCSE
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
======================================================
PLEASE NOTE the newsgroup SECURE CODE and PASSWORD were
updated on February 14, 2006.? Please complete a re-registration process
by entering the secure code mmpng06 when prompted. Once you have
entered the secure code mmpng06, you will be able to update your profile
and access the partner newsgroups.
======================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from this issue.
======================================================
This posting is provided "AS IS" with no warranties, and confers no rights.
======================================================







.

Relevant Pages

  • Re: Exchange 2003 Backup
    ... It is because you are backing up the store then the transaction logs. ... verify won't get to the transaction logs as they have been committed. ... Active backup destination: File ... Folder CHEESE\Microsoft Information Store\First Storage Group\Mailbox ...
    (microsoft.public.exchange2000.general)
  • Re: SBS backup failing, but is it?
    ... Tell us about the backup device and media? ... won't be able to restore those tapes. ... Even if a test restore works flawlessly, turning off verify is definitely ... > device reported an error on a request to read data from media. ...
    (microsoft.public.windows.server.sbs)
  • Re: Help - Backup not working after trying to get ISA 2004 to log to SQL
    ... Check to verify that the shared memory protocol is enabled. ... If you uninstalled SQL 2000 with SP4 on it then you may also want to check ... Backup log file shows this error: ... Connection to database failed. ...
    (microsoft.public.windows.server.sbs)
  • Re: NTBackup error: An inconsistency was encountered in the requested backup file
    ... I just now disabled Shadow Copies on the OS partition. ... I formatted one of my two external USB backup drives and ran a manual backup successfully. ... Operation: Verify After Backup ... Backup set #1 on media #1 ...
    (microsoft.public.windows.server.sbs)
  • RE: An inconsistency in backup file with Exchange 2003
    ... Verify just checks to make sure the media or the drive, ... Unfortunately the backup log doesn't give us any information on ... > server of our Windows Server 2003 domain. ... > backup with NTBackup gives me an error. ...
    (microsoft.public.exchange.admin)