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- tar: ./undotbs01.dbf: HELP - extract write error
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тАО04-10-2009 04:12 AM
тАО04-10-2009 04:12 AM
i am extracting information from tape using the following command:
tar -xvf /dev/rmt/0mn .
I am receiving the following result:
x ./system01.dbf, 1405100032 bytes, 2744336 tape blocks
x ./undotbs01.dbf, 5882519552 bytes, 11489296 tape blocks
tar: ./undotbs01.dbf: HELP - extract write error
Can you help me ?
What does this message mean?
Can i still recover from tape ?
Solved! Go to Solution.
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тАО04-10-2009 04:27 AM
тАО04-10-2009 04:27 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
can it be that the filesystem you are writing to is full? The error is 'extract WRITE error' not 'extract read error'.
Regards,
Bart
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тАО04-10-2009 04:46 AM
тАО04-10-2009 04:46 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
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тАО04-10-2009 04:57 AM
тАО04-10-2009 04:57 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
Did you use any special options.
Try to set blocking factor to 1. This will reduce read speed but it will prevent the error message if tape was written using a different blocking factor.
tar -b 1 -xvf /dev/rmt0mn .
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тАО04-10-2009 05:09 AM
тАО04-10-2009 05:09 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
cd /u02/MyDir
tar -cvf /dev/rmt/0mn .
The tape was written successfully and no error message was generated.
It extracts the first file of the directory successfully.
Can it be that the second file it is trying to extract is more than 2G or it has nothing to do with that?
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тАО04-10-2009 05:19 AM
тАО04-10-2009 05:19 AM
Solution> Can it be that the second file it is trying to extract is more than 2G or it has nothing to do with that?
Does the filesystem into which you are extracting support 'largefiles'? Examine with:
# mkfs -F vxfs -m /dev/vgNN/lvolX
(or):
# fsadm /mountpoint
Regards!
...JRF...
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тАО04-10-2009 05:28 AM
тАО04-10-2009 05:28 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
fsadm: /etc/default/fs is used for determining the file system type
nolargefiles
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тАО04-10-2009 05:30 AM
тАО04-10-2009 05:30 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
Certainly 2gig limits can come in to play w/ some unpatched versions of tar, or with destination filesystems that aren't largefile enabled.
of course knowing the source OS (and destination OS if different) wouldn't hurt either. and "pax" may let you extract this as well
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тАО04-10-2009 05:32 AM
тАО04-10-2009 05:32 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
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тАО04-10-2009 05:33 AM
тАО04-10-2009 05:33 AM
Re: tar: ./undotbs01.dbf: HELP - extract write error
You can change this with:
fsadm -F
regards,
Bart