Re: dirty device

[Kevin H <kevinh@xxxxxxxxxxx>]

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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