tape going unavail

[bkupmstr]

Has anyone seen a scenario like this.
 TSM server 5.1.0 running on aix 4.3.3
 Standalone 3590E tape rive defined to a manual library roblib00

09/04/03 23:24:00 ANR8325I Dismounting volume 040337-60 minute mount   
   retention expired.
09/04/03   23:24:41  ANR8469E Dismount of 3590 volume 040337 from drive RMT2
  (/dev/rmt2) in library ROBLIB00 failed.
09/04/03   23:24:41  ANR1410W Access mode for volume 040337 now set to
  "unavailable".
09/04/03   23:24:41  ANR8475I Dismount of volume 040337 failed. It may still be
  in the drive.


It actually dismounts teh tape from thedrive but still puts it into unavailable 
mode???


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Re: tape going unavail

[bkupmstr]

Thanks for the reply Jack, but I'm not getting any read or write errors and its a very 
intermittent problem.

I'm wondering if I have sonmeting wrong with my setup of the drive/library definitions.

There's really on library just 3590 autoloaders.


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Re: tape going unavail

[bkupmstr]

Thanks for your reply Brenda, but the tape does get ejected from the drive but somehow 
TSM is getting confused. Its not really a library so we just go pull the tape out.

But occasionally it goes to unavailable



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FILE Device class over NFS

[bkupmstr]

Ever get an answer to this one Dale.

I guess it wouldn't bode to well for DD if IBM came right out and stated that 
they don't support it?

Hmm

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RMAN direct to NFS

[bkupmstr]

Anyone out here thinking of sending oracle backup data direct to an NFS target?
Care to elaborate?

What is driving the process?
TSM licensing ?
DBA control?

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VTLs and D2D solutions

[bkupmstr]

Kevin,

I also think you should take a look at the SEPATON solution.
Highly scalable, and does also provide encryption done in the same hardware 
card as its compression.
Integrates easily in TEM environments

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Application called Teradata

[bkupmstr]

I have a very large client that backs up 70 tb daily with the API to a SEPATON 
appliance

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RMAN direct to NFS

[bkupmstr]

Chart2: what Vtl are you currently using and what does it cause a lot of 
overhead and complexity?

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Deduplication candidates

[bkupmstr]

Thomas,
First off, with all the great enhancehancements and current high stability 
levels I would recommend going straight to version 6.4
As you have already stated there are certain data types hat are good candidates 
for data deduplication and your database backup data definitely is and image 
files definitely aren't.

>From my experience oracle export files are traditionally good dedupe 
>candidates also.
>From what you describe, the SQL backup data minus the compression would also 
>be a good candidate.

The one thing you do not mention is how many versions of this backup data you 
are keeping?

>From my experience, unless you are keeping a minimum of 4 backup versions, the 
>dedupe ratios will suffer. Too many time I see folks keeping only 2 backup 
>versions nd they can't understand why they get very poor dedup rates

Also be aware that with TSM deduplication you will have to ensure that you 
write the backup data to a target disk pool that  will have good enough 
performance to not negatively impact backup speed.

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