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Backup job failing with no appendable media error

Created: 11 Jun 2013 | 10 comments

Hi,

One of my clients backups has started failing just recently with error "Drive and media mount requested date Media mount failed". Nothing has changed in the setup of the backup job and the tape should have plenty of space left to complete the job. I am also seeing the error "No appendable media could be mounted. Switching to overwrite operation on scratch media".

I'm at a loss to explain why this is happening. I have an Erase Tape job that runs just prior to the Backup job but in the past this has worked fine. The tape is an LTO 4 with hardware compression enabled and I get about 600GB on the tape before it produces the no appendable media error. The job is also set to append, overwrite if no appendable media is present. Like I said, this has not been an issue in the past.

Can anyone help as to why this could be happening??

Operating Systems:

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lmosla's picture

If you have been using this one tape for awhile try to use a new tape and see if this issue still occurs.  It might be a problem with the age of the tape.

robbiew's picture

we have four daily tapes and 4 weekly ones which get rotated. It happens no matter which tape is in. It's possible but unlikely the tape is the issue.

Thanks

pkh's picture

Go to Tools ---> Alert Categories and check whether there is an auto-response for the Media Insert alert.  If there is, clear it.

Run your job again and see whether there is any alert.

robbiew's picture

There is no auto-response for the Media Insert alert.

pkh's picture

Run the tape drive manufacturer's diagnostic utility against the tape drive/library.  Make sure that you select the write test and that you have stopped all the BE services beforehand.

Larry Fine's picture

The tape is an LTO 4 with hardware compression enabled and I get about 600GB on the tape before it produces the no appendable media error.

An LTO4 should get about 800GB without compression.  Are you saying that your tape is getting filled up at about 600 GB, while a job is running, and then BE is requesting a second (ie "spanned") media?  If so, it sounds like you might have a clogged head in your tape drive.  The technote below gives more info.  As this is a hard to diagnose issue, you should involve your hardware vendor.

http://www.symantec.com/docs/TECH193200

Tapes report full before their Native Capacity is reached

If you find this is a solution for the thread, please mark it as such.

lmosla's picture

not sure if this will work but its work a try ...  create and run a duplicate to disk backup job and run the restore from there.  see this link for info on creating a duplicate job http://www.symantec.com/business/support/index?page=content&id=TECH187265

robbiew's picture

Hi,

Yes. The tape seems to be "full" at about 600GB and then begins alerting for a new tape. I have contacted Symantec tech support and they believe the issue is with the drive itself as there is one hard read and one hard write error. I have run the Tandberg tape tools (the drive is a Tandberg LTO4 HH) but everything looks fine, it was able to write and read a full tape without errors. I have contacted Tandberg and now just waiting for the reply...Now I have to start looking at another client who is getting a similar issue except with USB drives. Fun fun fun

pkh's picture

Is your job targeted to the tape drive or All Devices?  It should be targeted to the tape drive.  If it is targeted to All Devices, then it may try to use the USB drive which will cause a problem.

robbiew's picture

The job is targeted at the specific drive. I have heard back from Tandberg and they believe the drive needs to  be replaced.