topic Re: gunzip test errors in Operating System - HP-UX

gunzip test errors

Milan Muralidharan — Thu, 17 Aug 2000 20:41:00 GMT

Testing the zipped file with 'gunzip -t'
shows "Unknown error". These are the zipped backup files. What i have to check for??
Appreciate your details.

Re: gunzip test errors

John Palmer — Thu, 17 Aug 2000 21:03:34 GMT

How have you created your 'zipped backup files'?

Re: gunzip test errors

Milan Muralidharan — Thu, 17 Aug 2000 21:10:04 GMT

With 'tar cvf - file1 file2 ...|gzip > zippedfile & ' command.

Re: gunzip test errors

John Palmer — Thu, 17 Aug 2000 21:13:44 GMT

Ther shouldn't be any problem with that.

Have you tested the contents with
gzcat | tar tvf -

If that's ok then it's 'gunzip -t' that's the problem.

Re: gunzip test errors

Milan Muralidharan — Thu, 17 Aug 2000 21:22:38 GMT

John,
It brings the follwing output:
"tar: usage tar [-]{txruc}[eONvVwAfblhm{op}][0-7[lmh]] [tapefile] [blocksize] fi
le1 file2... "

I think the arguments are not in line. Let me know your thoughts.

Thanks

Re: gunzip test errors

John Palmer — Thu, 17 Aug 2000 21:39:22 GMT

The arguments to tar are:-
tvf -
that is tvf-
did you omit the space?

Re: gunzip test errors

Milan Muralidharan — Thu, 17 Aug 2000 21:44:46 GMT

John,
It works and lists the file. You are amazing. Thanks a lot.

Re: gunzip test errors

Milan Muralidharan — Fri, 18 Aug 2000 13:19:26 GMT

John,
With another large zipped backup archive file when i use the "gzcat | tar tvf - " i get the folg error message:
: Unknown error
Tar: blocksize = 0; broken pipe?

I am not using any named pipe in this case.
Why am i getting this error. Appreciate your details.

Re: gunzip test errors

John Palmer — Fri, 18 Aug 2000 13:51:51 GMT

Milan,

In this case, gzcat is reporting the same error 'Unknown error' as gunzip -t was yesterday.

tar is just complaining that no data is being piped to it.

How big is the gzipped file ?

Re: gunzip test errors

Milan Muralidharan — Fri, 18 Aug 2000 13:55:49 GMT

The tar zipped file size is 12.5 Gb. The unzipped filesize could be about 100Gb.
This is the cold backup file for the production database.

Re: gunzip test errors

John Palmer — Fri, 18 Aug 2000 14:11:48 GMT

Milan,

I thought that you were going to say that...
tar does not support large files (> 2Gb) and I suspect that gzip/gunzip/gzcat don't either.

Re: gunzip test errors

Milan Muralidharan — Fri, 18 Aug 2000 16:59:41 GMT

I thought the tar -xvf along with gunzip could run as a background progress to extract the files to its original location irrespective of the size of the tar zipped file.