Check out selinux, use audit2allow to enable ssh root access.

On the other side it appears that you have a dirty shell you may try rsync -e. Another guess is that you are trying to backup a device, socket or other special file and still another one, check the backuppctopdir (wherever its mounted)

Cheers,
Pedro Oliveira
www.linux-geex.com

On Apr 9, 2012 7:18 PM, "Shang-Lin Chen" <schen AT gps.caltech DOT edu> wrote:

I recently upgraded a host from Red Hat Enterprise Linux 4 to Red Hat
Enterprise Linux 6. Since then, BackupPC backups have not been working.

I'm using rsync over ssh. I commented out 'Defaults requiretty' from
visudo on the upgraded host and added '-tt' flags to the ssh command to
get rid of error messages about lack of a tty. Now, when I start a full
backup, the backup begins to run, but 20 hours later, it's still running
until it exits with the message: "Aborting backup up after signal ALRM."
This looks like a timeout. Full backups of this host used to take less
than four hours.

When I look in the last bad XferLog, I see the following:

full backup started for directory / (baseline backup #433)
Running: /usr/bin/ssh -tt -q -x -l backuppc myhostname sudo /usr/bin/rsync --server --sender --numeric-ids --perms --owner --group -D --links --hard-links --times --block-size=2048 --recursive --one-file-system --ignore-times . /
Xfer PIDs are now 15493
Got remote protocol 1701274484
Fatal error (bad version): tcgetattr: Invalid argument

Sent exclude: /proc
Sent exclude: /tmp
Sent exclude: /wavearchive*
Remote[66]: nvalid argument

followed by a very long list of symbols and characters that probably indicate files being backed up, such as:

�I�O�    . �VcOmA  mnt �  K�A
lost+found@ْ_O�A  netC�`O�A  media �  K  dev  yk�O  boot �x`OmA .autorelabel<�`O��  srv �  K�A  opt ;iO         .autofsck<�`O��  etc0 j O�A  backup1 +[jO�A  usr ��iO�A  sys �`O  home �  K  cgroup O�=L  sbin0:>tOmA  miscC�`O�A  var M�`O  selinux �o`O  root �� OhA  www     rcO�A  bin :>tOmA  lib08>tO  opt/sun ;iO�A:  /javadb оiO8  /register.htmlC4(��J��8  demo ξiO�A:  ocs ϾiO:  javadoc ѾiO8  LICENSE^,%��J���
index.html� �  RELEASE-NOTES.html,V�  NOTICE% �  3RDPARTY�+8  bin ;iO�A:  lib ξiO8  demo/README.txtZ 1��J��8    templates ξiO�A�        databases �  programs 8  templates/server.policy� 3��J��:  databases/toursdb.jar�� 4��J8% ξiO�A�% /log 8& service.propertiesu 4��J��8( g0 ξiO�A8& log/logmirror.ctrl03��J���- .ctrl0�- 1.dat �& seg0/c90.dat`�, 311.dat �, 150.dat �, 371.dat �, 1f1.dat �, 31.dat@�, 161.dat �, 251.dat@�, 1b1.dat@�, 2c1.dat �, 101.dat �, 3b1.dat �, a1.dat`�, 111.dat �, 461.dat �, 20.datp�- 41.dat �, 51.dat@�, 4c0.dat��, 230.dat@ �, 1d1.dat �, 4d1.dat��, 361.dat �- 40.dat :, b1.dat 4��J:, 331.dat 3��J�, 260.dat �, 3a1.dat �, 41.dat@�, 200.dat �- d0.dat �, 420.dat0�, 130.dat �, 211.dat �, 10.dat �, 3c0.dat �- 00.dat �, 1a1.dat :, f0.dat 4��J:, 180.dat�3��J�, 221.dat �, 411.dat �, 510.dat �, 121.dat :, c0.dat 4��J:, 281.dat 3��J�, 450.dat0�, 501.dat �, 2a1.dat �, 4f0.dat �, 1c0.dat �, 290.dat �, 480.dat  �, 81.dat �, 1e0.dat �, 400.dat �, 191.dat@�, 2e1.dat �, 3e1.dat �, 4a1.datp�, 141.dat �, 380.dat �, 271.dat �, 391.dat �- 51.dat �, 491.datp�- e1.dat�:, e1.dat 4��J:, 321.dat 3��J�, 2f0.dat �, 441.dat �, 71.dat �, 4b1.dat��, 3d1.dat �, 431.dat :, d1.dat 4��J:, 171.dat 3��J�, 2b1.dat �, 60.dat �, 3f1.dat �, 471.dat 8 programs/vtis ξiO�A� simplemobile 8        demo.html" 3��J���
csfull.cssV58  localcal ξiO�A8  derbylogo128_bluebg.png� 3��J��8  toursdb ξiO�A�  nserverdemo �  scores 8  navbar.html� 3��J���  readme.html� 8  workingwithderby ξiO�A�  simple 8  vtis/README� 2��J��8" java ξiO�A�" data �" sql �" java/org �* /apache �1
/derbyDemo �; /vtis �@ /core �A snapshot �A example 8A core/VTIHelper.java8 2��J���F FlatFileVTI.javaM �F XmlVTI.java�.�F VTITemplate.javaC|�FQueryRow.java� �K VTIHelper.java 5�F XMLRow.javau �F StringColumnVTI.javaa@�A#snapshot/SubscriptionSignature.javaN �K napshotQuery.java| �K ubscription.java�T�A example/VTIs.java� �I DerbyJiraReportVTI.java� �I WorldDBSnapshot.java� �I ApacheServerLogVTI.javat �I SubversionLogVTI.java� �I LineListVTI.java" �I PropertyFileVTI.java� �" data/DerbyJiraReport.xml � �' svn_log.txt�t

Could somebody help figure out what's going on here?

Thanks,
Shang-Lin

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------------------------------------------------------------------------------
For Developers, A Lot Can Happen In A Second.
Boundary is the first to Know...and Tell You.
Monitor Your Applications in Ultra-Fine Resolution. Try it FREE!
http://p.sf.net/sfu/Boundary-d2dvs2

_______________________________________________
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-- 
Shang-Lin Chen
Southern California Earthquake Data Center (SCEDC)
System administrator/Programmer
http://www.data.scec.org