Re: Odd error from amcheck

> On Apr 17, 2019, at 12:15 PM, Jason L Tibbitts III <[email protected]> wrote:
> 
> I had a bit of downtime with my backup server (not related to Amanda)
> and after getting things running again I've seen a couple of odd
> problems related to labels.
> 
> Today I got the following from amcheck:
> 
> NOTE: Holding disk '/local/amanda/work': 7461020 MB disk space available, using 7460920 MB
> slot 19:amcheck-device: TypeError in method 'storage_getconf', argument 1 of type 'storage_t *' at /usr/lib64/amanda/amcheck-device line 165.
> 
> That corresponds to this block of code:
> 
>                } elsif ($dev->status & $DEVICE_STATUS_VOLUME_UNLABELED and
>                         $dev->volume_header and
>                         $dev->volume_header->{'type'} == $Amanda::Header::F_WEIRD) {
>                    my $autolabel = storage_getconf($storage, $STORAGE_AUTOLABEL);
>                    if ($autolabel->{'non_amanda'}) {
>                        print STDERR " contains a non-Amanda volume\n";
>                    } else {
>                        print STDERR " contains a non-Amanda volume; check and relabel it with 'amlabel -f'\n";
>                    }
> 
> which would seem to suggest that it's finding the tape to be unlabeled.
> And last night in order to get things to run, I had to relabel a tape.
> But these tapes have all been previously labeled, and in fact I've been
> using them for a while.  I have no idea what could cause them to become
> unlabeled, besides the obvious cause of something writing to them.  But
> the tape in slot 19 was just loaded and hasn't been in the drive in some
> time.
> 
> If I run amtape inventory, it tells me
> 
> [...]
> slot 18: label C00018 barcode C00018L6 [retention-tapes]
> slot 19: blank barcode C00019L6
> slot 20: label C00020 barcode C00020L6 [retention-tapes]
> [...]
> 
> but... it was fine and had a label last night.  And I have a feeling
> that tape C00020 will end up being unlabeled tomorrow.
> 
> Has anyone seen anything like this?  What's the magic incarnation to
> read the amanda label from a tape without running amanda tools?  (I know
> dd should do it but I can't seem to find the right combination of
> options.)
> 
> - J<


mt -f /dev/nst0   rewind
dd if=/dev/nst0   of=MyFile   bs=512k   
mt -f /dev/nst0   rewind     !! so ready for amanda to use it

for   /dev/nst0   substitute the location of your drive   (grep amanda.conf  to find it)

for bs=512k   you may have to guess higher or lower (if an older, smaller tape).
This is usually the hardest part to guess at.


Then do     more MyFile
read the first block   and ^Q   out of the rest.   

Mine shows    
AMANDA: TAPESTART DATE 20190204200001 TAPE ad5-daily-123
^L


Deb Baddorf
Fermilab