Networker

Re: [Networker] HELP!! Getting error "Tape positioning by record is disabled"

2007-10-03 14:13:53
Subject: Re: [Networker] HELP!! Getting error "Tape positioning by record is disabled"
From: "Werth, Dave" <dave.werth AT GARMIN DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Wed, 3 Oct 2007 11:06:15 -0700
Dave,

We get these occasionally with our AIT-4 drives as well.  For the most
part it appears to be because the drive needs cleaning. It could also be
caused by a bad tape or because the tape drive itself needs maintenance
beyond cleaning.

I've found that automatic cleaning doesn't work very well for us.  Now I
run the AIT cleaning tape manually through each of our two drives at
least once a week.  Often I'll do it twice in a row.  This seems to keep
these kind of errors down.  One other thing, when I'm introducing brand
new tapes to the library they appear to "shed" material at a greater
rate until they get "burned in".  I increase my cleaning rate if I'm
doing a bunch of new tapes.

We have a SpectraLogic 10K with 2 AIT-4 drives. We back up then clone
around 900 GB per week to each the 2 drives.

Dave

David Werth
Garmin AT, Inc
Salem, Oregon
dave.werth<at>garmin.com

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Dave Martini
Sent: Wednesday, October 03, 2007 10:01 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] HELP!! Getting error "Tape positioning by record is
disabled"

I'm running Legato Networker 7.3  on Solaris 9 with a SpectraLogic 2k 
tape library
wtih dual Ait-5 drives inside.

My tapes are being marked full prematurely. I'm getting this error in 
my logs which I thnk
is causing it. What does this mean and how do I fix it? I have the 
st.conf entry set the way
that Spectralogic told me to. From what I understand the st.conf 
entry is set to a variable
block size.

Here are the errors I get just before it marks my tapes full
Notice this error which I think  is key
Cannot decode block. Verify the device configuration. Tape 
positioning by record is disabled.
How do I fix this?


10/02/07 20:12:12 nsrd: media warning: Jukebox `[email protected]' 
Hardware status of jukebox '[email protected]' changed from 'ready' to 
'detected hardware change'
10/02/07 20:12:13 nsrmmgd: Resynchronizing jukebox `[email protected]' 
with nsrlcpd.
10/02/07 20:12:46 nsrd: media info: Jukebox `[email protected]' Hardware 
status of jukebox '[email protected]' changed from 'detected hardware 
change' to 'ready'
10/02/07 20:13:34 nsrd: media info: WORM capable for device 
/dev/rmt/1cbn has been set
10/02/07 20:29:31 nsrd: media warning: /dev/rmt/1cbn moving: fsr 
6318: drive status is Media Error, Reposition Error
10/02/07 20:29:31 nsrd: media emergency: could not position 000010 to 
file 127, record 6319
10/02/07 20:29:31 nsrd: media info: WORM capable for device 
/dev/rmt/1cbn has been set
10/02/07 20:29:32 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:32 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:33 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:33 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:33 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:33 nsrd: media warning: /dev/rmt/1cbn reading: I/O error
10/02/07 20:29:34 nsrd: media notice: Volume "000010" on device 
"/dev/rmt/1cbn": Cannot decode block. Verify the device 
configuration. Tape positioning by record is disabled.
10/02/07 20:29:34 nsrd: media warning: verification of volume 
"000010", volid 4278364588 failed, can not read record 6319 of file 
127 on 8mm AIT-5 tape 000010
10/02/07 20:29:34 nsrd: media notice: verification of volume 
"000010", volid 4278364588 failed, volume is being marked as full.
10/02/07 20:29:34 nsrd: write completion notice: Writing to volume 
000010 complete
10/02/07 20:29:34 nsrd: media notice: Save set (2248325853) 
erdfilespace:/Volumes/DATA1 volume 000010 on /dev/rmt/1cbn is being 
terminated because: Media verification failed
10/02/07 20:29:34 nsrd: mmd 1, authorized mode (0), active mode (0), 
re-setting authorized sessions (0) to number of active sessions (1)


Thank you.
Dave Martini
LLNL

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