Networker

Re: [Networker] Excessive time to reposition an LTO tape for writting

2003-02-21 12:44:32
Subject: Re: [Networker] Excessive time to reposition an LTO tape for writting
From: "Girot, Jean-Pierre" <Jean-Pierre.Girot AT FR.MTI DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Fri, 21 Feb 2003 18:47:40 +0100
Hello,

Perhaps you can check the IBM LTO firmware 

Regards


-----Message d'origine-----
De : Jon Hickmott [mailto:jonny AT UWO DOT CA]
Envoyé : vendredi 21 février 2003 18:20
À : NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Objet : [Networker] Excessive time to reposition an LTO tape for
writting


Our Environment

   * Sun E450 running solaris 8 and legato 6.1.1
   * Fiber attached StorageTek L700 with 4 IBM LTO tape drives

Problem situation

   * running a saveset clone
   * clone pool has close to full tapes marked as '100%' but not 'Full'
     (>100GB on then already (full seems to be ~140GB))
   * The system mounts one of these close to full clone tapes to append
     to it
   * It sits there saying "Moving forward xxx files" for 45 minutes or
     more
   * In the mean time (about 30 minutes in) the clone process or mount
     process times out and restarts
   * A 2nd tape for the clone pool is mounted (if it is close to full
     the process begins again)
   * The clone completes on the 2nd mounted tape (or 3rd sometimes)
   * The other close to full tapes that were mounted end up in a "ready
     of writing, idle" state after 45 minutes or so and we can not get
     them back without restarting networker.

Does anyone know why it is taking so long to reposition a tape? Does it
have something to do with the 100% full indication or the pool
type(clone)? I have not seen this problem yet while doing regular
backups - only the clones. Any tips would be great.

Thanks,
Jon

--
Jon Hickmott - jonny AT uwo DOT ca - NSC211c - (519) 661-2111x86025
Unix/Database administrator - ITS - UWO

"There are only 10 kinds of people in the world --
   Those who understand binary, and those who don't."

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