Same situation here. We have a 3584 with 12 drives that have been in use for about a year. We pump about a Terabyte of data through them everyday, and our cleaning tape has been used twice in the past year. We have had numerous tapes get stuck in drives, and had to have IBM come out and take the drives apart to get the tapes out, but we have not had a read or write error on a single tape as of yet.
I've spoken to our IBM engineer about the cleaning frequency and she was surprised also. Next time I talk to her I might ask her to research it a little more for me. I also noticed there is a CLEANFREQUENCY parameter that can be set at the drive level within TSM. All of our drives are set to NONE. I wonder if setting this to ASNEEDED would cause them to be cleaned more frequently. -----Original Message----- From: David Longo [mailto:[EMAIL PROTECTED] Sent: Monday, June 23, 2003 8:59 PM To: [EMAIL PROTECTED] Subject: Re: Interesting LTO fault's symptom Interesting. I have had an IBM 3584 library with (8) LTO1 drives, FC attached for over a year with no problem. Cleaning tape was installed initially and autoclean turned on on the library. Tape has not been used yet!. I backup nearly 700GB of data a day and make offsite copies. Don't do a lot of restores. I started with 100 tapes in system and now have 220. I remember a thread some months ago - maybe a year about cleaning. Everybody then commented that their cleaning tapes weren't getting used either. Anybody know what should be a "reasonable" use of the cleaning tape? 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 [EMAIL PROTECTED] >>> [EMAIL PROTECTED] 06/23/03 20:14 PM >>> Greeting TSMers, I have read this thread with great interest as we seem to have similar symptoms on the same kind of equipement. IBM are confounded at present but are starting to come to the same conclusion as me that the autoclean symptom on the library is not functioning as it should. We originally put this down to TSM having control of the cleaning tapes but have now resolved this and cleaning is still not happening. We use our drives (3 of them) 18-20 hours a day and the last cleaning was a manual one we did 3 months ago! The IBM engineer said he surprised it still works at all. We have thrown out 5 tapes (from a library of 110) over the last 15 months which we now believe may not have been faulty at all, just victims of a dirty drive! There is another thread related to the same errors (1117 etc) listed in this list back in February which leads me to the same conclusions. If IBM come up with a solution I will post it here. David Fosdike Senior Technical Specialist Elders Limited 08 8425 4565 0417 714 467 '...despise not the day of small things...' >-----Original Message----- >From: Tomáš Hrouda Ing. [mailto:[EMAIL PROTECTED] >Sent: Monday, 16 June 2003 9:44 PM >To: [EMAIL PROTECTED] >Subject: Interesting LTO fault's symptom > > >Hi all, > >during last weeks I did interesting findings at one of production LTO >3583-L18 library. There are 2 drives and both was changed past series >of media faults (one of them twice) past about 1 year of >operation. We have >about 20 "historicaly touched" tapes with average 3-4 write >faults. Media >faults are still repeated and my finding is all that faults >were done at >70-75% of estimated capacity (set by longterm using to 105GB, >we use client >compression) during filling the tape. It seems like all tapes >were corrupted >nearly at the same place, of course there is some diffusion >because this is >only estimated filling. Faults at these tapes are repeatedly occured at >these percents of max capacity. > >I understand when one tape has media fault repeatedly at the >same place, but >about 20 tapes? Could it mean that all tapes were corrupted by >one bad drive >at the same place, or can be reason at microcode? > >We are in contact with our IBM support to solve it, but I am >interested if >anybody of you register similar phenomenon? > >Tomas > ############################################################## This message is for the named person's use only. It may contain confidential, proprietary, or legally privileged information. 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