Re: dirty device

hi Lenny

dirty devices cause so many retries, retries on retries etc..  The effect, 
as you found out, can be enormous.
Are these tapes old ??  There used to be a time when we dumped old media 
<eventually> .

Another avenue you might wanna explore is --
-> have you added PTFs lately ??
-> were you previously running a SAVCHGOBJ and that is now changed to SAVOBJ

Another , less likely avenue, is changes to the hardware config.
It can make a difference, although not as radical as you reported,
placing tape drives and disks strategically, balancing the I/O thruput
of the busses etc... but, like i say, not as radical as you reported..

Personally, I would buy some new media,  clean the device and run with new 
media.
That will answer your one question..

good luck
kevin

At 10:58 PM 5/8/2001, you wrote:
>We're having a problem with backup.  It normally takes 3 hours but last 
>night it ran for 11 hours before it was cancelled.  There are 
>informational messages on the operator's message queue about the tape 
>drive needing to be cleaned but these appear every night.
>
>The tape drive is cleaned daily but after so many gigabytes of saved data, 
>the dirty device messages seem to be inevitable.
>
>One theory is that the media itself may be dirty which makes the tape 
>drive dirty.  This could explain the variation in elapsed time.
>
>Could the device getting dirty slow down the job that much?
>
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****************************************************************
Kevin M Howcroft                http://www.kmtcinc.net
AS/400 Technical Consultant     Voice:407.830.5960
kevinh@kmtcinc.net              Fax: 407.650.2638

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