On Tuesday 26 October 2004 17:14, Joe Rhett wrote: >> On Monday 25 October 2004 17:53, Joe Rhett wrote: >> >In particular, the alpha documentation for amanda indicates that >> > amanda will move on to the next tape for EOT -- this apparently >> > isn't true at all. >> > >> >11.3.2 End of tape handling >> >As in earlier versions of AMANDA, taper itself does not try to >> > restrict writing to the tape size given in the config file. It >> > relied on planner having correctly estimated backup sizes and >> > limiting itself to what would fit on one tape. >> > >> >Now, taper needs to switch to a new tape when the current tape >> > has filled up. The tape is considered full when taper gets a >> > write error. This will most likely occur in the middle of >> > writing a (potentially large) backup file, perhaps even from a >> > direct-to-tape socket, so there is no possibility of starting >> > the backup file over again on the next tape, it must start from >> > where it left off, rewriting the block that got the error on the >> > next tape. >> > >> > To insure correct operation, the file header of the continued >> > file should contain an indication that it is a continuation, and >> > at what offset. amrestore of course needs to be aware of this >> > scheme and handle it correctly, perhaps by double-buffering >> > internally. >> >> If the file cannot be restarted from byte 1 on the next tape, eg >> the system cannot back up to the start of the file being written, >> then something is seriously wrong with the method being used. In >> the case of no holding disk, then it seems setting one up would be >> the answer. >> >> In no event will amanda actually "continue" a file on the next >> tape, its a basic design decision, and while there have been some >> patches available from 3rd parties to do this, I'm certainly not >> privy to any discussions as to the feasability of incorporating >> such a bug/feature into an actual amanda distribution. And the >> dual labeling of such a method above is 100% intentional. > >So can you please reconcile your statement and the documentation > above? Or take an action item to update the documentation if it is > wrong?
Unforch, I don't have access to the documentation, nor do I read the code so well that I could write correct docs from it. I suspect that Stefan W. might be the one to ping on this. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 99.28% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attorneys please note, additions to this message by Gene Heskett are: Copyright 2004 by Maurice Eugene Heskett, all rights reserved.
