On Mon, Apr 25, 2022 at 12:11:37PM -0500, Hector Gonzalez Jaime via Dng wrote:
> 
> On 4/24/22 12:17, Hendrik Boom wrote:
> > Suddenly it cannot write on a file system.  Presumably the backup drive?  
> > The one it has already filled with 215831712 iK blocks and has abother 
> > 1608278664 available?
> > 
> > Then more complaints about banned unicode characters, and then another 
> > similar backtrace ending with
> > 
> > OSError: [Errno 30] Read-only file system
> > 
> > Is anyone else having problems like these?  Is rdiff-backup busted?  Or is 
> > my new backup drive or my USB interface busted?
> 
> This might mean your system detected a format problem with your backup disk, 
> have you tried to remount it?  Check your kernel log,
> if there is such a problem it would remount the disk read only.  You can 
> verify with the mount command and no arguments.
> If that is the case, you should umount the disk, and run fsck on it before 
> trying to mount the disk again.

Some kind of success:  I mv'd the backup directory that backup-rdiff created 
out of the way, and repeated the backup, with a few extras to, before and 
after, show what files /dev/sd* existed and/or mounted.

This time it all seems to have worked, except for a few odd messages:

Warning: modification time of 
b'/usbackup/backup-by-rdiff/april/farhome--hendrik/dn/dosgames/Truelove/rdiff-backup.tmp.234919'
 isbefore 1970
Warning: modification time of 
b'/usbackup/backup-by-rdiff/april/farhome--hendrik/dn/dosgames/Truelove/rdiff-backup.tmp.234920'
 isbefore 1970
Warning: modification time of 
b'/usbackup/backup-by-rdiff/april/farhome--hendrik/dn/dosgames/Truelove/rdiff-backup.tmp.234921'
 isbefore 1970
Warning: modification time of 
b'/usbackup/backup-by-rdiff/april/farhome--hendrik/dn/dosgames/Truelove/rdiff-backup.tmp.234922'
 isbefore 1970

The files it's trying to back up seem to be dated in 1916 or 1919. Suspicious, 
but not likely a backup failure.  Maybe I should change their dates to 
something valid, like early in 1970?

-- hendrik
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