Thanks for the links.
I have read a few of those bits, and figured it was backward compatible also.
Just tried your suggestion and I get exactly the same error.

It really has me stumped, and I'm surprised other people have not come across 
it. Because I get the same thing for every 3.0.2 tape I have tried.

Any other thoughts?

Stephen.
________________________________________
From: lst_hoe02 AT kwsoft DOT de [lst_hoe02 AT kwsoft DOT de]
Sent: 19 February 2013 14:55
To: bacula-users AT lists.sourceforge DOT net
Subject: Re: [Bacula-users] FW: difficulty reading tapes after upgrade 3.0.2 -> 
5.2.12

Zitat von GILES Stephen <stephen.giles AT ed.ac DOT uk>:

> Hello,
>
> Is anyone able to suggest anything, or point me in a direction?
> Have I hit an unknown bug as I can't think what else to try.
>
> My bacula-sd.conf looks like this.
>
> Please see additional information below.
>
> ----------
> Storage {                             # definition of myself
>   Name = iota-sd
>   SDPort = 9103                  # Director's port
>   WorkingDirectory = "/var/spool/bacula"
>   Pid Directory = "/var/run"
>   Maximum Concurrent Jobs = 20
> }
>
> Director {
>   Name = iota-dir
>   Password = "###"
> }
>
>
> # NEO2000 tapedrive1
> Device {
>   Name = NeoLTO3-0
>   Drive Index = 0
>   Media Type = LTO3
>   Archive Device = /dev/nst0
>   Device Type = Tape
>
>   AutoChanger = yes;
>   AutomaticMount = yes;
>   AutoSelect = yes;
>
>   AlwaysOpen = no;
>   RemovableMedia = yes;
>   RandomAccess = no;
>   Maximum Network Buffer Size = 262144
>   Maximum File Size = 10gb
>
>   Minimum blocksize = 262144
>   Maximum blocksize = 262144
>
>   Spool Directory = /bacula-spool/1/
> }
>
> # NEO2000 jukebox
> Autochanger {
>   Name = NEO2000-1
>   Device = NeoLTO3-0
>   Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
>   Changer Device = /dev/sg13
> }
>
> Messages {
>   Name = Standard
>   director = iota-dir = all
> }
>
>


Hello

The documentation for the on-tape-format is here:

http://www.bacula.org/2.4.x-manuals/en/developers/Storage_Media_Output_Format.html

and at first glance old tape from version 3.x should be readable and
http://www.bacula.org/5.2.x-manuals/en/main/main/Bacula_Security_Issues.html#SECTION004310000000000000000
 also suggest
so.

One thing to try is to only set the Maximum blocksize = 262144 and
leave the Minimum blocksize at the default (0) to prevent Bacula from
using *fixed* blocksize.

Regards

Andreas



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