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Not Appendable (End Marker Unreadable)

Created: 07 Feb 2007 • Updated: 21 May 2010 | 5 comments

Hi All,

I have seen some old threads around this topic, but unfortunately none of the posts have been helpful to me.

My setup is as follows:

Windows Server 2003 R2 � Fully Patched.
Backup Exec 11d � Fully Patched
Quantum PX502 Auto Library with two DLT-S4 Drives

I have preformed the long erase on tapes (Which are brand new), I have changed the jobs to see if it caused by specific files with no result. While I have seen that using the overwrite option rather than the append option can stop this happening, it is not something I want to do (Each tape holds 800GB native, not going to write once to each tape).

HELP!

Cheers,
Michael

Comments 5 CommentsJump to latest comment

Philip Pearson's picture

-Run a quick erase on all tapes (new and used) before overwriting them

-Make sure that all new tapes are in the Scratch Media Pool prior to writing to them for the first time (do not manually move them into a media set)

-Make sure the tape hardware is plugged into a backup power supply and that no updates such as AV wor Windows run at the same time as the backup

-Don't reboot the media server or stop the Backup Exec Services during a backup

-Use the Backup Exec User Interface to cancel jobs if you need to and allow it to cancel without stopping the services

Bjørn Halstad's picture

Does the backup jobs complete successfully?
Also right click on the tape device and see the statistics, what are the figures for soft and hard errors? Then do the same on a few of the tapes and check the same stats.
If there are hard errors have a look for scsi events in the System event log.

Rgds,

Bj�

Ken Putnam's picture

You must have an existing BackupSet on the tape volume before BackupExec can append to it. If you have labeled new tapes and moved them to the target media set, BackupExec will accept the tape, but be unable to find or read the End-Of_Data marker, since one does not exist.


The first time that you use these tapes, they MUST be overwritten, after that they can be appended to.


You can define you job as "Apppend, Else Overwrite". If an appendable tape is found, the job will proceed as Append, if one cannot be found, the job will continue as Overwrite

If this response answers your concern, please mark it as a "solution"

peter zelonis's picture

From the instructions earlier in the thread:
-Run a quick erase on all tapes (new and used) before overwriting them
-Make sure that all new tapes are in the Scratch Media Pool prior to writing to them for the first time (do not manually move them into a media set)

When I get new media, I have been manually moving them into a media set. I am going to start adhering to the above advice. But after running the quick erase, how does the media move from scratch media set to an existing media set?

Ken Putnam's picture

BackupExec will move it when it writes the new label to the tape.

If this response answers your concern, please mark it as a "solution"