Todd, what kind of tapes do you use (Imation, 3M, IBM, Fuji ? 

We had much much more r/o tapes with Imation than with IBM ones !

rené

-----Original Message-----
From: Todd Lundstedt [mailto:Todd_Lundstedt AT VIA-CHRISTI DOT ORG]
Sent: Monday,13. October 2003 18:36
To: ADSM-L AT VM.MARIST DOT EDU
Subject: 3584 Cleaning Frequency


What is the normal clean frequency for LTO-1 drives in a 3584?  I have the
drives defined to TSM with a cleaning frequency of "none", and the 3584
library set to Automatic cleaning, per recommendations.  Yet, when I use
the front panel of the 3584 to look at the cleaning cartridges, one has
never been used, and the other has only been used 4 times.  We have had
this library for nearly 2 years now.  I started looking at this because of
the number of tapes that are marked read-only or unavailable per night
(anywhere from one to 7 so far, usually 2 or 3 per night).  The eight
drives show as follows:

Drive1
Library Loads:  10391
Library Unloads:        10381

Drive Loads:    867 (drive1 has been reset recently)
MB Written:             2903279
MB Read:                1923642
Cleans:         0
--------------------------
Drive2
Library Loads:  10023
Library Unloads:        10015

Drive Loads:    6535
MB Written:             49313622
MB Read:                26764547
Cleans:         0
--------------------------
Drive3
Library Loads:  10239
Library Unloads:        10234

Drive Loads:    1598
MB Written:               10083308
MB Read:                5886656
Cleans:         0
--------------------------
Drive4
Library Loads:  6877
Library Unloads:        6873

Drive Loads:    6461
MB Written:             44438571
MB Read:                25808491
Cleans:         0
--------------------------
Drive5
Library Loads:  6528
Library Unloads:        6527

Drive Loads:    6705
MB Written:             47722355
MB Read:                28614867
Cleans:         0
--------------------------
Drive6
Library Loads:  1933
Library Unloads:        1932

Drive Loads:    2144
MB Written:             11874084
MB Read:                6888474
Cleans:         0
--------------------------
Drive7
Library Loads:  2051
Library Unloads:        2050

Drive Loads:    2823
MB Written:             27765506
MB Read:                7691746
Cleans:         0
--------------------------
Drive8
Library Loads:  2102
Library Unloads:        2101

Drive Loads:    2265
MB Written:             12299072
MB Read:                8002016
Cleans:         0

These tape drives have transferred thousands of terabytes of data (what's
that.. exabyte?), apparently without cleanings.  What can I check to find
out why, other than what I mentioned above (Lib set to AUTO, and drives
set in TSM to none).
Thanks in advance
Todd