John Drescher wrote: > > > On 7/3/07, *Shon Stephens* <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]>> wrote: > > that is my question. My mtx-changer script currently contains > > mt -f $device rewoffl > > in the "unload" routine. I don't believe that my tapes should be > being rewound, but I'm just not sure. Basically, if the tape is in > PoolA and a job runs that needs a tape from PoolB, it will rewind > the tape from PoolA, unload it, and load the tape from PoolB. The > next job could need the tape from PoolA, if this tape gets loaded, > will it being rewound previously cause Bacula to overwrite data? > Or will Bacula seek the tape to find where to append to? > > Also, when I need to change magazines in my autochanger, should I > rewind the tapes first? The next time the tapes go back into the > magazine, they will be overwritten. > > > I am not sure what type of drive you are using but with DLT or LTO I > know the drive will do this during an unload as this media has one > spool on the drive and one spool on the tape so the only way to unload > it would be to rewind first. > > If you have a tape media with 2 spools (AIT?) bacula still rewinds on > unload because on every load it reads the tape header which is the > beginning of the tape.
My experience with DDS and AIT (both 2 spool systems) is that they also rewind to unload. Push the eject button on a DDS/3 drive and you can hear it rewinding before it ejects. Takes forever if the tape was substantially written before the eject. Happens pretty quickly if the tape was just put in. --------------- Chris Hoogendyk - O__ ---- Systems Administrator c/ /'_ --- Biology & Geology Departments (*) \(*) -- 140 Morrill Science Center ~~~~~~~~~~ - University of Massachusetts, Amherst <[EMAIL PROTECTED]> --------------- Erdös 4 ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
