On Tuesday 02 January 2007 23:39, Meidal, Knut wrote: > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Kern > Sibbald > Sent: Saturday, December 23, 2006 12:43 AM > To: bacula-users@lists.sourceforge.net > Cc: Meidal, Knut > Subject: Re: [Bacula-users] Bacula and tape ejects from Autoloader > > On Friday 22 December 2006 23:15, Meidal, Knut wrote: > > Hello, > > > > > > > > I'm currently considering setting up a small "below the radar" Bacula > > installation. > > > > I happen to have NetApp NearStore VTLs with capacity on them, that I can > use > > as my back-end. > > > > > > > > VTL is a virtual tape library, i.e a collection of disk that presents > itself > > on a FibreChannel port as being a regular tape library. > > > > > > > > These VTLs are connected to a physical tape library. The backup > application > > doesn't see the physical tape library directly. > > > > The way it works is that I will define virtual libraries on the VTL, > define > > drives and slots, and assign to a server. This server thinks he's talking > to > > a regular tape library; mounts/reads/writes like always. > > > > The magic happens when the application or OS issues an "EJECT" command to > > move a tape (it doesn't know it's a virtual tape) to the I/O slot. > > This question is not possible to answer because you are using a terminology > that does not correspond to that which I know. > > There is to the best of my knowledge (in the Unix world) no "EJECT" command. > > On the contrary there are exist two commands that Bacula uses. One is > the "offline" command, and normally will discharge a tape from a tape > reader. > This is equivalent to the mt offline command, and Bacula can do offlines at > particular times on request -- in fact, it is an OS API done through > ioctl(). > > The second is an "unload" command that unloads a cassette from an autoloader > > drive. This command is a SCSI control command that Bacula issues by calling > > a program named mtx on most Unix systems (FreeBSD typically uses a different > > program). Bacula does not directly issue SCSI command such as the unload, > but relies on mtx to do so for it. mtx will unload a tape in a particular > drive into a specified "slot", which must be empty. > > If your concept of "EJECT" corresponds to one of the above, then most likely > > it can be done in Bacula. > > =====================> > My terminology might be a little skewed after too much Veritas NetBackup > exposure... > > Anyway, my point about the "eject" is that this is not a _drive_ operation > as such. > It is not related to umount, or unload of the drives themselves. (A possible > exception is if the tape is idle in a drive, it should be umounted, > unloaded, and THEN put in the import/export slot without stopping by its ) > > What I'm looking for is the library control software (MTX) to recognize one > or more tape slots as "Import/Export"... > Let's say my library has 6 of those. > I want MTX (or Bacula wrappers) to "eject V0123L2", which means to "move > tape V0123L2 from whatever storage slot, and put in I/E slot 1" (If I/E slot > 1 is full, pick the next available) > > The library cannot be opened to retrieve this tape. There are no (easy) ways > of moving it other than using the library Web GUI, which is a pain, and > cannot be scripted. > > The reason I bring this up is that the movement of a (virtual) tape to the > "Import/Export" slot of a virtual library is what triggers the virtual > library into transferring the data off the virtual tape(i.e a byte stream on > disk) on to a physical tape. >
OK, that is a lot clearer. There is no direct way to run these kinds of commands within Bacula. However, you can schedule an Admin job to script this or you can run it manually by "unmounting" the autochanger in Bacula (or stopping the SD) then using the mtx command, then restarting or mounting the autochanger in Bacula. ------------------------------------------------------------------------- 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
