>>>>> On Sun, 29 Apr 2007 21:22:20 -0400, Mike Seda said: > > All, > I want to duplicate a tape volume to another tape volume. Since I only > have one tape drive, I must copy the tape volume to a disk volume and > then copy the disk volume to a duplicate tape. > > Question # 1 > If I ever need to bscan in the duplicate tape, I want the volume name to > be that of the original input tape volume. Will bcopy accomplish this > for me, or will the resulting duplicate tape volume name be that of the > disk volume?
Neither -- bcopy never copies the volume label, so the label on the new tape will remain. The label on the disk volume is irrelevant. > Question # 2 > The one thing that I do not like about bcopy is that it wants you to > actually create the duplicate volumes in the catalog even though there > will be no job records associated with these volumes. Since, I find this > unnecessary and confusing, I am tempted to just use dd to accomplish my > tape duplication task. Since bacula reads files in 32K buffers, I came > up with the following dd command: > dd if=/dev/nst0 of=<volume_name>.img ibs=32k > Will the aforementioned dd command provide me a good dd image that I can > subsequently write to a duplicate tape? Maybe. A couple of things that will affect it: 1. The dd will stop at an eof marker on the tape. Bacula puts eof markers between jobs and also every 1GB (by default). You'll probably need to run dd several times to different img file until it reports end of tape and then the same number of calls to dd to write the new tape. 2. The default block size is variable, not 32K, unless you override that in the configuration. I don't think you can duplicate variable block sizes with dd. __Martin ------------------------------------------------------------------------- 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
