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Whats causing these errors?


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Hello All. The last two backups ive run on our SCSI LTO3 drive have failed. We use different tapes each day and the last two backups have suddenly started to fail. (the last one having over 1500 errors.

 

Were running Retrospect (8.1 build 626) on a Xserve 10.5.8. The tapes are not barcoded. The drive is a Quantum lto 3 400gb/800gb hh ultra160 68pin scsi tabletop using a single Sony lto3 ultrium tape at a time.

 

Here are the errors:

 

May 20th

From Retrospect: Script "Weekly Set 1" failed during automatic execution, error -102 ( trouble communicating). Please launch Retrospect and check the log for details.

On this backup it completed 328Gb

 

May 21st

Script "Weekly Set 1" completed with 14 errors

 

*File "/Volumes/Raid/Fileserver/CLIENTS/xxxxxx/xxxxx.psb": didn't compare

>

!Bad Media Set header found (0x91ff81ff at 170169152)

>

!Bad Media Set header found (0x92492492 at 170171067)...

 

 

May 22nd

Script "Weekly Set 1" completed with 1529 errors

 

Similar errors to the night before:

 

5/22/2010 2:20:21 AM: Comparing CLIENTS

>

!Bad Media Set header found (0x8c5ddee8 at 2)

>

!Bad Media Set header found (0x21be910f at 24)

>

!Bad Media Set header found (0x2267588b at 37)

 

 

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The drive is a Quantum lto 3 400gb/800gb hh ultra160 68pin scsi tabletop

 

- Connected to what SCSI HBA on the other end?

- Running what driver?

- With what firmware?

 

- For how long has this setup been running reliably?

- Has anything changed since before the errors?

- Have you cleaned the tape heads?

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Thanks for your Reply

 

Connected to a ATTO EXPRESS PCI-E UL5D DUAL CHANNEL U320 SCSI HOST ADAPTER.

 

Using Configuration Tool 3.28

Running Driver v4.4.1

It says Flash Version April 10, 2009

 

The setup has been running fine for nearly a year, apart from an issue we are having with the tape names not being recognised. Thread here: http://forums.dantz.com/showtopic.php?tid/33852.

 

The only thing we have changed is to change the backup script to eject a tape after a backup (although we have had successful runs after that)

 

I have noticed that there was a 'Java for Mac OS X 10.5 Update 7' on the 20th. Coincides with the errors starting but cant believe its that.. is it?

 

We have cleaned the tape heads.

 

Does that help?

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I have noticed that there was a 'Java for Mac OS X 10.5 Update 7' on the 20th. Coincides with the errors starting but cant believe its that.. is it?

That's a useful bit of information.

 

You might want to try a regression test from a (spare drive) clean install of 10.5.x without that update. Or wait for the Retrospect big bugfix update ("real soon, now").

 

Russ

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