[Bacula-users] Block checksum mismatch Error during restore

[Matthias Vogt]

Hi,

I testing Bacula 1.36.0 at the moment. Everthing work fine, except the restore makes waves. If I restore tape stored files I sometime get an error like this

--------------
DNS-and-FTP-Server: -rwxr-xr-x 1 root root 4761012 2005-05-23 08:23:33 /home/bacula-restores/opt/blackdown-jdk-1.4.
2.01/jre/lib/i386/server/libjvm.so
basis-server-sd: RestoreFiles.2005-06-02_18.34.53 Error: block.c:304 Volume data error at 0:546! Block checksum mismatch in bl
ock 546: calc=e10b0d03 blk=243833da
DNS-and-FTP-Server: RestoreFiles.2005-06-02_18.34.53 Error: attribs.c:339 File size of restored file /home/bacula-restores/opt
/blackdown-jdk-1.4.2.01/jre/lib/i386/server/libjvm.so not correct. Original 4761012, restored 1409024.
basis-server-dir: RestoreFiles.2005-06-02_18.34.53 Error: Bacula 1.36.0 (20Oct04): 02-Jun-2005 18:35
JobId: 2
Job: RestoreFiles.2005-06-02_18.34.53
Client: DNS-and-FTP-Server
Start time: 02-Jun-2005 18:34
End time: 02-Jun-2005 18:35
Files Expected: 247,101
Files Restored: 2,106
Bytes Restored: 34,801,378
Rate: 828.6 KB/s
FD Errors: 1
FD termination status: Error
SD termination status: Error
Termination: *** Restore Error ***

-------------

I use a HP StorageWorks Ultrium 460 Tape Drive (LTO-2). I've read that this error is maybe caused by an damage tape drive or tape. Is that true? I have tested different tapes and the error somtimes still appears deping on amount of data or whatever.
If I run the SD with the -p option the restore works and the relevant files seem to be ok.

Is this really a tape drive problem or maybe a controller error or .... ? How can I be sure that all my files are restored right at any time when using the -p option? I have to backup 8 Servers and an amout of data of 200 GB.

Best regards

Matty






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[Dan Langille]

Post by Matthias Vogt
Hi,
I testing Bacula 1.36.0 at the moment. Everthing work fine, except the
restore makes waves. If I restore tape stored files I sometime get an
error like this
--------------
DNS-and-FTP-Server: -rwxr-xr-x 1 root root 4761012
2005-05-23 08:23:33 /home/bacula-restores/opt/blackdown-jdk-1.4.
RestoreFiles.2005-06-02_18.34.53 Error: block.c:304 Volume data error
at 0:546! Block checksum mismatch in bl ock 546: calc=e10b0d03
blk=243833da DNS-and-FTP-Server: RestoreFiles.2005-06-02_18.34.53
Error: attribs.c:339 File size of restored file
/home/bacula-restores/opt
/blackdown-jdk-1.4.2.01/jre/lib/i386/server/libjvm.so not correct.
02-Jun-2005 18:35 Files Expected: 247,101 Files
828.6 KB/s FD Errors: 1 FD termination
*** Restore Error ***

The file sizes differ:

Original 4761012
restored 1409024

Could this have been overwritten after/during backup?

[Danny Butroyd]

Post by Matthias Vogt
Hi,
I testing Bacula 1.36.0 at the moment. Everthing work fine, except the restore makes waves. If I restore tape stored files I sometime get an error like this
--------------
DNS-and-FTP-Server: -rwxr-xr-x 1 root root 4761012 2005-05-23 08:23:33 /home/bacula-restores/opt/blackdown-jdk-1.4.
2.01/jre/lib/i386/server/libjvm.so
basis-server-sd: RestoreFiles.2005-06-02_18.34.53 Error: block.c:304 Volume data error at 0:546! Block checksum mismatch in bl
ock 546: calc=e10b0d03 blk=243833da
DNS-and-FTP-Server: RestoreFiles.2005-06-02_18.34.53 Error: attribs.c:339 File size of restored file /home/bacula-restores/opt
/blackdown-jdk-1.4.2.01/jre/lib/i386/server/libjvm.so not correct. Original 4761012, restored 1409024.
basis-server-dir: RestoreFiles.2005-06-02_18.34.53 Error: Bacula 1.36.0 (20Oct04): 02-Jun-2005 18:35
JobId: 2
Job: RestoreFiles.2005-06-02_18.34.53
Client: DNS-and-FTP-Server
Start time: 02-Jun-2005 18:34
End time: 02-Jun-2005 18:35
Files Expected: 247,101
Files Restored: 2,106
Bytes Restored: 34,801,378
Rate: 828.6 KB/s
FD Errors: 1
FD termination status: Error
SD termination status: Error
Termination: *** Restore Error ***
-------------
I use a HP StorageWorks Ultrium 460 Tape Drive (LTO-2). I've read that this error is maybe caused by an damage tape drive or tape. Is that true? I have tested different tapes and the error somtimes still appears deping on amount of data or whatever.

I have had this problem before and i too thought at first it was dodgy
media/drive/scsi card, however, the problem "went away" when I upgraded
to the latest version of bacula (currently 1.36.3). I also use and
LTO-2 tape libraray (Overland Powerloader) but im not sure that this has
anything to do with the issue :)

Cheers
Danny

[Kern Sibbald]

Post by Danny Butroyd

Post by Matthias Vogt
Hi,
I testing Bacula 1.36.0 at the moment. Everthing work fine, except the
restore makes waves. If I restore tape stored files I sometime get an
error like this
--------------
DNS-and-FTP-Server: -rwxr-xr-x 1 root root 4761012 2005-05-23
08:23:33 /home/bacula-restores/opt/blackdown-jdk-1.4.
2.01/jre/lib/i386/server/libjvm.so
basis-server-sd: RestoreFiles.2005-06-02_18.34.53 Error: block.c:304
calc=e10b0d03 blk=243833da
DNS-and-FTP-Server: RestoreFiles.2005-06-02_18.34.53 Error: attribs.c:339
File size of restored file /home/bacula-restores/opt
/blackdown-jdk-1.4.2.01/jre/lib/i386/server/libjvm.so not correct.
02-Jun-2005 18:35 JobId: 2
Job: RestoreFiles.2005-06-02_18.34.53
Client: DNS-and-FTP-Server
Start time: 02-Jun-2005 18:34
End time: 02-Jun-2005 18:35
Files Expected: 247,101
Files Restored: 2,106
Bytes Restored: 34,801,378
Rate: 828.6 KB/s
FD Errors: 1
FD termination status: Error
SD termination status: Error
Termination: *** Restore Error ***
-------------
I use a HP StorageWorks Ultrium 460 Tape Drive (LTO-2). I've read that
this error is maybe caused by an damage tape drive or tape. Is that true?
I have tested different tapes and the error somtimes still appears deping
on amount of data or whatever.

I have had this problem before and i too thought at first it was dodgy
media/drive/scsi card, however, the problem "went away" when I upgraded
to the latest version of bacula (currently 1.36.3). I also use and
LTO-2 tape libraray (Overland Powerloader) but im not sure that this has
anything to do with the issue :)

The most likely source of this kind of error is a bad tape or possibly bad
RAM. It would be *really* hard for Bacula to create a block checksum error
because of a bug. I can believe that the problem went away when you
upgraded, but it was most likely because you changed tapes.

[Danny Butroyd]

Post by Kern Sibbald

Post by Danny Butroyd

Post by Matthias Vogt
Hi,
I testing Bacula 1.36.0 at the moment. Everthing work fine, except the
restore makes waves. If I restore tape stored files I sometime get an
error like this
--------------
DNS-and-FTP-Server: -rwxr-xr-x 1 root root 4761012 2005-05-23
08:23:33 /home/bacula-restores/opt/blackdown-jdk-1.4.
2.01/jre/lib/i386/server/libjvm.so
basis-server-sd: RestoreFiles.2005-06-02_18.34.53 Error: block.c:304
calc=e10b0d03 blk=243833da
DNS-and-FTP-Server: RestoreFiles.2005-06-02_18.34.53 Error: attribs.c:339
File size of restored file /home/bacula-restores/opt
/blackdown-jdk-1.4.2.01/jre/lib/i386/server/libjvm.so not correct.
02-Jun-2005 18:35 JobId: 2
Job: RestoreFiles.2005-06-02_18.34.53
Client: DNS-and-FTP-Server
Start time: 02-Jun-2005 18:34
End time: 02-Jun-2005 18:35
Files Expected: 247,101
Files Restored: 2,106
Bytes Restored: 34,801,378
Rate: 828.6 KB/s
FD Errors: 1
FD termination status: Error
SD termination status: Error
Termination: *** Restore Error ***
-------------
I use a HP StorageWorks Ultrium 460 Tape Drive (LTO-2). I've read that
this error is maybe caused by an damage tape drive or tape. Is that true?
I have tested different tapes and the error somtimes still appears deping
on amount of data or whatever.

I have had this problem before and i too thought at first it was dodgy
media/drive/scsi card, however, the problem "went away" when I upgraded
to the latest version of bacula (currently 1.36.3). I also use and
LTO-2 tape libraray (Overland Powerloader) but im not sure that this has
anything to do with the issue :)

The most likely source of this kind of error is a bad tape or possibly bad
RAM. It would be *really* hard for Bacula to create a block checksum error
because of a bug. I can believe that the problem went away when you
upgraded, but it was most likely because you changed tapes.

All I would say is that (in my experience) the newer version seems to
deal with the error of having file size mismatches better (i.e. before
it stopped the whole restore process, whereas now it complains but
carries on)

[Kern Sibbald]

Hello,

Hi,
i have tried version 1.36.3 but the error still appeared. BUT I solved the
problem finally :-) I update the HP StorageWorks Ultrium 460 Tape Drive
with latest firmware update. Now it works fine without errors. Quite
interessting!!!

Yes, that is very interesting. I have never heard anything like that before.
Does HP provide any explanation on the problem and why the firmware upgrade
fixed it ?

[Matthias Vogt]

Hello,

I didn't find any explanations or similar error descriptions on the HP Support Site. Just updating the firmware was my last idea what I could do.

See firmware changes on this drive:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?locale=en_US&lang=English+%28US%29&pnameOID=238673&prodSeriesId=238671&prodTypeId=12169&basePartNum=COL1925&locBasepartNum=co-24250-1&os=Red+Hat+Linux+7.2&tech=Firmware

May updating the firmware could resolve same or similar problems with other tape drives.

Best regards

Matty

Post by Kern Sibbald
Hello,

Hi,
i have tried version 1.36.3 but the error still appeared. BUT I solved the
problem finally :-) I update the HP StorageWorks Ultrium 460 Tape Drive
with latest firmware update. Now it works fine without errors. Quite
interessting!!!

Yes, that is very interesting. I have never heard anything like that before.
Does HP provide any explanation on the problem and why the firmware upgrade
fixed it ?
--
Best regards,
Kern
(">
/\
V_V

__________________________________________________________
Mit WEB.DE FreePhone mit hoechster Qualitaet ab 0 Ct./Min.
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[Kern Sibbald]

Post by Kern Sibbald
Hello,
I didn't find any explanations or similar error descriptions on the HP
Support Site. Just updating the firmware was my last idea what I could do.
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lo
cale=en_US&lang=English+%28US%29&pnameOID=238673&prodSeriesId=238671&prodTyp
eId=12169&basePartNum=COL1925&locBasepartNum=co-24250-1&os=Red+Hat+Linux+7.2
&tech=Firmware
May updating the firmware could resolve same or similar problems with other tape drives.

It is probably the "Improvements to SCSI compatibility/connectivity" that made
the difference. I read this as "we corrected a bug"

Post by Kern Sibbald
Best regards
Matty

Post by Kern Sibbald
Hello,

Hi,
i have tried version 1.36.3 but the error still appeared. BUT I solved
the problem finally :-) I update the HP StorageWorks Ultrium 460 Tape
Drive with latest firmware update. Now it works fine without errors.
Quite interessting!!!

Yes, that is very interesting. I have never heard anything like that
before. Does HP provide any explanation on the problem and why the
firmware upgrade fixed it ?
--
Best regards,
Kern
(">
/\
V_V

__________________________________________________________
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[Matthias Vogt]

Hi,

i have tried version 1.36.3 but the error still appeared. BUT I solved the problem finally :-) I update the HP StorageWorks Ultrium 460 Tape Drive with latest firmware update. Now it works fine without errors. Quite interessting!!!

Best regards Matty


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