NTBackup Failing every 2nd night of backups



This seems to happen each and every 2nd night of backing up my system. The
backup fails. Can someone help me out.

Below is the log:
3/1/2007 10:00 PM
-------------------------------
Date: 3/1/2007
Time: 10:00 PM
User: SYSTEM
-------------------------------

Backup Runner started.
Launching NTBackup: ntbackup.exe backup "@C:\Program Files\Microsoft Windows
Small Business Server\Backup\Small Business Backup Script.bks" /d "SBS Backup
created on 3/1/2007 at 10:00 PM" /v:yes /r:no /rs:no /hc:off /m normal /j
"Small Business Server Backup Job" /l:s /f "F:\Backup Files\Small Business
Server Backup (03).bkf" /UM
NTBACKUP LOG FILE: C:\Documents and Settings\SBS Backup User\Local
Settings\Application Data\Microsoft\Windows NT\NTBackup\data\backup10.log
=====================<BEGIN NTBACKUP LOG FILE>=====================
Backup Status
Operation: Backup
Active backup destination: File
Media name: "Small Business Server Backup (03).bkf created 3/1/2007 at 10:00
PM"

Volume shadow copy creation: Attempt 1.
Backup (via shadow copy) of "C: "
Backup set #1 on media #1
Backup description: "SBS Backup created on 3/1/2007 at 10:00 PM"
Media name: "Small Business Server Backup (03).bkf created 3/1/2007 at 10:00
PM"

Backup Type: Normal

Backup started on 3/1/2007 at 10:13 PM.
Backup completed on 3/1/2007 at 11:18 PM.
Directories: 6594
Files: 97173
Bytes: 19,426,377,484
Time: 1 hour, 4 minutes, and 44 seconds
Backup (via shadow copy) of "D: Data"
Backup set #2 on media #1
Backup description: "SBS Backup created on 3/1/2007 at 10:00 PM"
Media name: "Small Business Server Backup (03).bkf created 3/1/2007 at 10:00
PM"

Backup Type: Normal

Backup started on 3/1/2007 at 11:18 PM.
Backup completed on 3/2/2007 at 4:07 AM.
Directories: 26988
Files: 255274
Bytes: 112,015,782,489
Time: 4 hours, 48 minutes, and 48 seconds
Backup (via shadow copy) of "F: New Volume"
Backup set #3 on media #1
Backup description: "SBS Backup created on 3/1/2007 at 10:00 PM"
Media name: "Small Business Server Backup (03).bkf created 3/1/2007 at 10:00
PM"

Backup Type: Normal

Backup started on 3/2/2007 at 4:07 AM.

Error: The device reported an error on a request to write data to media.
Error reported: Invalid command.
There may be a hardware or media problem.
Please check the system event log for relevant failures.
The operation was ended.
Backup completed on 3/2/2007 at 5:38 AM.
Directories: 2
Files: 0
Bytes: 20,372,418,554
Time: 1 hour, 30 minutes, and 52 seconds

Error: F: is not a valid drive, or you do not have access.


----------------------

The operation did not successfully complete.

----------------------

=======================<END NTBACKUP LOG FILE>=====================
NTBackup finished the backup with errors.

For more information about failed backups, see the article on
troubleshooting your backup at the following Web page:
http://go.microsoft.com/fwlink/?LinkId=18414

Backup ended at Friday, March 02, 2007 5:39 AM
Backup Runner finished.
.



Relevant Pages

  • Re: Backups Failing with error code 0X80070458
    ... Microsoft CSS Online Newsgroup Support ... you get error 0x80070458 in the backup log. ... different media block sizes. ...
    (microsoft.public.windows.server.sbs)
  • RE: Backups Failing with error code 0X80070458
    ... In the backup log, I found "Unable to detect tape drive or tape ... The problem may cause be caused by backup device. ... uninstall drivers for any removable storage devices (USB Hard Drives, ... different media block sizes. ...
    (microsoft.public.windows.server.sbs)
  • [SUMMARY] Using tar to restore files backup up using Veritas Netbackup
    ... Once you import the catalog data, you can select the files with Netbackup client softwre. ... Step 1 is performed with the first form of the command shown above and recreates catalog entries for the backups that are on the specified media. ... For example, if a backup is imported on 11/14/98 and its retention level is one week, its new expiration date is 11/21/98. ...
    (SunManagers)
  • Re: Backups Failing with error code 0X80070458
    ... I renamed NTMSDATA & then restarted storage service & this allowed backups ... In the backup log, I found "Unable to detect tape drive or tape ... different media block sizes. ...
    (microsoft.public.windows.server.sbs)
  • RE: An inconsistency was encountered on the requested media
    ... Drive and server itself before i post this message and I am looking ... I did try to backup manually as you directed before to troubleshoot script ... Microsoft CSS Online Newsgroup Support ... Will enumerate on 3 media libraries found. ...
    (microsoft.public.windows.server.sbs)