Re: Speed on 3581 LTO-2 Tape Drive

[richard@xxxxxxxxxxx]

Hello Pete, 

Thanks for the input. 

These are all new images that were recently loaded on a brand new V5R2 
box, so Type-2 is the default. 

I think maybe the drive isn't able to stream because of the large number 
of small objects. 

Have you ever heard of a UDFS (User Defined File System) ?   I have seen a 
few vendor products use UDFS for creating IFS objects in the past. 

I have played with it and it works. For backup you simply Unmount and Back 
Up the UDFS object, but this seems like an odd way to handle IFS files and 
the IBM docs are almost non-existent. I was thinking maybe is the UDFS is 
a single object, the backups would be faster as well. 

Regards,
Richard Schoen
RJS Software Systems Inc. 

Email: richard@xxxxxxxxxxx
Web Site: http://www.rjssoft.com
Tel: (952) 898-3038
Fax: (952) 898-1781

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We noticed that when doing some backups in the IFS, we had converted the 
IFS to type-2 from type-1, and that made our backup significantly faster.

    That isn't tuning the 3580, but I think you will see a difference.

    Pete Massiello