well I suppose that S stands for super then... :-)

So SAIT-1 ... I looked that up and the native transfer speed is
30MB/sec, so 45MB/s sounds valid... 70-90 sounds like compressible data
- so maybe there is a performance hit in your config somewhere..

A suggestion for a test might be to backup some pre-compressed data.
bzip2 is good for this - do a time comparison of backing up this same
data direct to tape and via adv_file...     

Just grasping in the dark here - but what is the zpool config?
Raid-z?  Mirrors? Compression?


-----Original Message-----
From: Stan Horwitz [mailto:stan AT TEMPLE DOT EDU] 
Sent: Thursday, 21 August 2008 11:01 PM
To: Peter Viertel
Cc: EMC NetWorker discussion
Subject: Re: [Networker] Query in Staging from adv_file

I am using SAIT-1, not AIT-1. I routinely see 70-90MB/s on my tape  
drives when doing direct backups (no advfs involved) for multiple  
sessions. The RO and writable parts of the advfs are both owned by the  
same tape pool.


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