topic Re: command cp corrupted files in Operating System - HP-UX

command cp corrupted files

tom quach_1 — Mon, 15 Jun 2009 22:30:06 GMT

Dear,

i have a strange situation, never seen before.
i have a mounting point PROD(from prodserver) mounted to the DEV box (itanium 11.31)
PROD SERVER IS A ITANIUM 11.31 also.
when programmers copy files (executable files) and put on PROD and then they connected to the PROD server and ran it, the error said the file was corrupted. but if they FTP from the DEV to the PROD server, then it was fine.
this is a line in the file /etc/fstab on the DEV server

10.10.4.40:/PROD /PROD nfs rw,suid 0 0
and it only happens to cobol exec file.
Please give me some advices.
Regards,
Tom

Re: command cp corrupted files

Michael Steele_2 — Mon, 15 Jun 2009 22:39:13 GMT

how is it happening? No idea. However, I always run cksum before and after, make a tar ball with the find command and ftp the tarball. Always works.

cd ./dir
find ./dir -depth | xargs tar -cvf dir_backup.tar
find ./dir -depth -exec tar -cvf dir_backup.tar {} \;

Note the ./dir, backup without absolute pathname all the way up to root.

Re: command cp corrupted files

tom quach_1 — Mon, 15 Jun 2009 22:48:45 GMT

Thanks Michael,

the FTP is working without tarball. they don't want to tar and untar a file.
Not sure something with the mounting point.
Regards,
Tom

Re: command cp corrupted files

Dennis Handly — Tue, 16 Jun 2009 01:31:13 GMT

I've had corruption on NFS files with old automounters. Some machines would fail and others would work.

Re: command cp corrupted files

Steven Schweda — Tue, 16 Jun 2009 03:41:30 GMT

> [...] the error said the file was
> corrupted.

It might be more helpful to see the actual
command and the actual error message.

Have you looked at the files to see what's
different?

Re: command cp corrupted files

Laurent Menase — Tue, 16 Jun 2009 11:16:59 GMT

update nfs 11.31.07.01 it should avoid out of order scheduling error on nfs.

Re: command cp corrupted files

sreekanthtm — Tue, 16 Jun 2009 12:07:20 GMT

Hi,

Hope your cobol exec file contains some spesific pattern, which make clash with NFS. I mean, while trasfering this pattern from one server to another, NFS would recognise this as a special instruction.

You can log a call with HP (If you have AMC) or Patch your Server with latest update, and update NFS also.

Rgds,
Sreekanth.

Re: command cp corrupted files

Tingli — Tue, 16 Jun 2009 13:41:08 GMT

I remember that in Tru64, soft mount nfs might lose some chunks when cp files. Maybe this is the same case.

Re: command cp corrupted files

Dennis Handly — Tue, 16 Jun 2009 13:47:45 GMT

>Tingli: soft mount NFS might lose some chunks when cp files.

My case was with blocksizes and a chunk was repeated and another was removed.
"nfsstat -m" showed UDP and version 2.

Re: command cp corrupted files

Laurent Menase — Tue, 16 Jun 2009 14:59:14 GMT

really check that you are well using the last version of nfs. ONC 11.31.07.01 and not 11.31.05 or older.

Re: command cp corrupted files

tom quach_1 — Tue, 16 Jun 2009 17:32:22 GMT

Thank you all for your inputs.

my version of NFS is B.11.31.02 ONC/NFS
i should upgrade it to this

11.31.07.01

Regards,
Tom