Hi,

If you have compression switch on on the clients side this is normal.
With a 3:1 compression ration claimed by IBM on the 3570 drives
you would see +- 15Gig or more on your tapes - but only if you have
compression switched off on the client side and let the drive do the
compression. Adsm only reports the amount of data that the drive
sucks (any better word for this?) of the disk or client. So if the data
being sent to the drive can be compressed it would be able to suck
a lot of the disk or client - giving you the 15Gig + report.

Hope this explains your question.

Regards

Christo Heuer
Johannesburg
South Africa


>Hello,
>
>I´m using the Magstar 3575 L12 for the first time.   We have 3750 C
>-Drives.
>I´m surprised, that only 5150 MB are written on the first tape, that
>becomes full.
>Is there a need to activate compression ???
>
>
>Automated Libraries : MAG
>
>Library Name MAG
>Library Type SCSI
>Device LB0.1.0.1
>ACS Id -
>External Manager -
>
>
>
>Automated Drives : MAG_DR1
>
>Library Name MAG
>Drive Name MAG_DR1
>Device Type 3570
>Device MT0.0.0.1
>ON LINE YES
>Element 16
>ACS DriveId -
>
>
>
>With best regards
>
>Sabine Rettenberger
>=