ADSM-L

Re: Cartridge Estimated capacity

2004-01-22 11:56:43
Subject: Re: Cartridge Estimated capacity
From: David Longo <David.Longo AT HEALTH-FIRST DOT ORG>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 22 Jan 2004 11:55:58 -0500
Relatively simple.  The "EST CAP" is set when you define the DEVCLASS,
probably 80GB in this case (see line for tape 000034).  When data is then
writtent to the tape, the EST Cap is updated to the ACTUAL capacity
when the tape gets FULL.  This may be higher or lower than the value
in the defioned devclass.

The tape will show the original EST Cap while FILLING until the amount
of data exceeds this value.  Then it increases as data is added
until tape is FULL.

The tapes that show FULL but have a pct Util less than 100 are 
mostly tapes had some of the data expired since they became FULL.


David B. Longo
System Administrator
Health First, Inc.
3300 Fiske Blvd.
Rockledge, FL 32955-4305
PH      321.434.5536
Pager  321.634.8230
Fax:    321.434.5509
david.longo AT health-first DOT org


>>> rouzen AT UNIV.HAIFA.AC DOT IL 01/22/04 11:45AM >>>
Hi to all

Can anybody tell me why the huge difference between  the numbers of
Estimated Capacity  of a full cartidge DLT8000 (40/80 G). The format of the
devclass was configure to DRIVE.
The nodes are backup without compression .

Here the output of the q vol.

Volume Name               Storage      Device      Estimated    Pct   Volume
                          Pool Name    Class Name   Capacity   Util   Status
                                                        (MB)
------------------------  -----------  ----------  ---------  -----
--------
000002                    SCA_UNIX     SCALARCLA-   58,089.8   96.5    Full
                                        SS
000009                    SCA_UNIX     SCALARCLA-  165,222.0   64.6    Full
                                        SS
000016                    SCA_UNIX     SCALARCLA-   76,230.3   49.1    Full
                                        SS
000027                    SCA_UNIX     SCALARCLA-   65,272.7   40.9    Full
                                        SS
000034                    SCA_UNIX     SCALARCLA-   80,000.0    3.9  Filling
                                        SS
000044                    SCA_UNIX     SCALARCLA-  136,684.2   62.8    Full
                                        SS
000111                    SCA_UNIX     SCALARCLA-   48,768.3   44.5    Full
                                        SS
000141                    SCA_UNIX     SCALARCLA-   51,704.7   40.6    Full
                                        SS
000158                    SCA_UNIX     SCALARCLA-   70,574.6   97.3    Full
                                        SS
000159                    SCA_UNIX     SCALARCLA-   80,000.0   62.9  Filling

T.I.A Regards
Robert Ouzen
E-mail: rouzen AT univ.haifa.ac DOT il

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