External event caused rewind during write

Updated: 22 May 2010 | 4 comments

skarve

Certified

0 0 Votes

Hello All,

I have a HP MSL 2024 autolader which is giving me issues. This is a new setup of Netbackup 6.5.1 on RHEL 4. The backups run fine till the tape fills up and then I get 84(media write error). I have checked that the bptm logs have the following entry.

14:55:35.628 [18520] <2> write_data: block position check: actual 3012, expected 727699

14:55:35.628 [18520] <2> set_job_details: Sending Tfile jobid (262)

14:55:35.628 [18520] <2> set_job_details: LOG 1207551335 16 bptm 18520 FREEZING media id 5682L3, External event caused rewind during write, all data on media is lost

Has Anyone come across this issue earlier? I have tried reducing and increasing both SIZE_DATA_BUFFER and NUMBER_DATA_BUFFERS but to no use. Any help will be appreciated.

Please note the system logs do not point to any hardware issue and the firmware is also updated and supported.

Thanks

Sumeet

discussion Filed Under:

Backup and Archiving, NetBackup

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Apr

2008

0 Votes 0

Zmiley

Hello Sumeet,

i had the same problem with my notes-backups. The library is an Adic/Quantum Scalar i2000.

This problem occurs irregularly with 2 different drives. You should check the error-log, which drive has the problem, if there are more than one.

First you should cleanup the drive(s) three times. The magnetic read/write-Head could be dirty from tape particles.

But this doesn't help us. I have seen, that the drives are on the same FibreChannel-Slot on two different IO-Blades (controlers for FibreChannel at my library).

So we shutted down and started the libary and the problem was gone. Since 2 months no problem like this.

bye

Smiley

Apr

2008

0 Votes 0

skarve

Certified

Hi Smiley,

Unfortunately we have a single drive :( . So we surely know the problem is with this drive :). As you said we have to clean and shutdown/start the library. I will do that tomorrow. If you can think of anything else will be glad to know.

Thanks

Sumeet.Karve

Apr

2008

0 Votes 0

Omar Villa

Have u check with HP to verify the drive is healty? stop writing and rewind, can be a bad tape also, have you try with a different media?

Omar A Villa

Netbackup Expert

These are my personal views and not those of the company I work for

Apr

2008

0 Votes 0

skarve

Certified

Hi Omar,

I have already contacted HP they claim things are fine. I have tried different media as well. But no change in the situation. The backups run for around 20 Gigs data or sometime 40 gigs and then error out.

Thanks

Sumeet.Karve

External event caused rewind during write

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