Hello, On 2/15/2007 12:00 PM, Erik P. Olsen wrote: > I know this has been discussed in length before, but I have just seen a > behaviour that can explain some of the problems with tapes being considered > "full" when they are actually only partially filled. > > With my setup I have 4 scsi devices of which I normally only use two, the > tape > streamer and a scanner. I normally keep the tape streamer open to bacula > because > then I won't forget to mount the tape prior to the back-up cycle. Yesterday. > however, I noticed when operating the scanner that the tape device suddenly > started rewinding the tape apparently initiated by activity on the scanner.
I suppose the rewinding was triggered by a SCSI bus rest. The more devices you operate per SCSI bus, the higher the probabilty for that. Scanners are quite often behaving bad and thus need a reset... for example if the scanner goes into power save mode and the application can't wake it up in time. Checking your systemlogs might reveal some information, but that depends on your SCSI HBA driver IIRC. In any case, if my assumption is correct this is one of the reasons why you should not operate tape drives together with scanners on one bus. Arno > Of > course I should have remounted the tape - but forgot. Next morning - the > back-up > schedule is at 2 o'clock at night - the tape was ejected and claimed full by > bacula and the job was waiting for the mounting of a new appendable volume. I > changed the status of the ejected volume from full to append and remounted it > and the back-up job ran to completion without further problems. > > So apparently an activity on another scsi device on the same cable may cause > the > tape device to rewind and thus get out of sync with bacula. I don't know if > this > is a problem which may be fixed by bacula but I doubt it. With this behaviour > in > mind I have started to unmount the tape when the back-up is completed and to > mount it again shortly before start of next back-up cycle. > -- IT-Service Lehmann [EMAIL PROTECTED] Arno Lehmann http://www.its-lehmann.de ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
