hello,

no it couldn't, because we calculated it excluding the
mounting time .... when the data started to be
transfered and written to the tape

Thx
Sandra

--- "Fletcher, Leland D." <ldfletcher AT CAL.AMEREN DOT COM>
wrote:
wrote:
> A comment about performance being 9 minutes to tape
> and 75 seconds to disk.
> Is it possible that most of the 9 minutes was tape
> mount and positioning
> time?
>
>
> > Please respond to "ADSM: Dist Stor Manager"
> <ADSM-L AT VM.MARIST DOT EDU>
> > Sent by:        "ADSM: Dist Stor Manager"
> > <ADSM-L AT VM.MARIST DOT EDU>
> > To:     ADSM-L AT VM.MARIST DOT EDU
> > cc:
> >
> > Subject:        Performance again!!!
> >
> > Hello everybody,
> >
> > It seems like TSM performance problems will neer
> > end!!!
> >
> > Here is the new problem:
> >
> > The customer is running TSM 4.2.1.0 on a Windows
> > 2000
> > server machine . An IBM rack case 82XX  which
> > contains
> > a Quantum DLT8000 tape drive is connected to the
> > server.
> > The driver version for the Quantum DLT drive is
> 1.5
> > and
> > is installed on the W2K machine. We tried a backup
> > of
> > 350MB on the local server with the Windows 2000
> > Backup
> >
> > utility and it took us approximately 75 seconds .
> >
> > Next , we tried the same Backup from TSM using its
> > Device Driver and it took us about 9 minutes . We
> > tried switching TSM to use the Native device
> driver
> > but still we got the same performance result .
> >
> > So we upgraded to 4.2.2 ; In the Device Manager
> for
> > TSM,we can see that TSMSCSI.exe is upgraded to
> > 4.2.2.25 and the ADSMSCSI.sys is 4.2.2.3 .  The
> > server
> > has a version of 4.2.2.25 .  Still , we obtained
> > poor
> > backup performance .
> >
> > We suspected that maybe it was a database
> bottleneck
> > ( eventhough it is still empty) ; so we tried the
> > same
> > Backup using TSM but the destination was on the
> > HardDisk.
> > The performance was good and the backup finished
> > within 75seconds .  So, we can eliminate the
> > database
> > problem.
> > Also, we noticed with version 4.2.2.0 that it is
> > crashing frequently . It was exiting abnormally .
> >
> > On the site of tivoli, the latest version of TSM
> > server is 4.2.2 . We do not have the 5.1 release .
> >
> > does anyone have a suggestion?
> >
> > thx a lot
> > Sandra
> >
> > __________________________________________________
> > Do You Yahoo!?
> > LAUNCH - Your Yahoo! Music Experience
> > http://launch.yahoo.com <http://launch.yahoo.com/>
>
>
>
> Lee Fletcher
> Network Project Integrator
> Ameren Callaway Plant
> 573-676-4106
> ldfletcher AT cal.ameren DOT com


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