First make sure your device class has FORMAT specified as DRIVE. If the
drive is enabled for compression (check via your library's web GUI),
then you can expect anywhere from 800GB to 1.6TB of utilization. With
mixed data types I typically see ~1.2TB.
One other option to set is the ESTCAPACITY=1600G when defining/updating
the device class.
Also make sure you TSM level is 5.3.5.2 or 5.4.1 or higher.
And last but not least, $40 at CDW will get you a sheet of labels. When
tapes cost $100 each, I'm sure you can justify $2/label.
CK
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
David Hensley
Sent: Thursday, July 17, 2008 10:07 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Tape question.
I have LTO4 tapes with LTO3 barcodes on each tape. When the tapes are
checked in as scratch TSM sees the size of 1.5gb. When used they go to
full
status with around 800gb on each tape. Compression is turned on. I
believe
this is due to the LTO3 barcodes, since LTO3 compressed tapes are 800gb.
I
need to know if this is the case that TSM is seeing these as LTO3s
instead
of LTO4s. If someone could point me to some documentation I would
appreciate it. I have tried telling this to my management and they do
not
believe this is so. Thank you.
Dave Hensley
Technical Analyst
McNeilus Companies, Inc.
Desk: 1-507-374-8587
Cell: 1-507-244-0921
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